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Medical Dictionary - Dictionary of Medicine and Human Biology


Medical Dictionary


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


paroophoritis (par′o-of′o-ri′tis)
Inflammation of tissues adjacent to the ovaries. [paroophoron + G. -itis, inflammation]

paroöphoron (par-o-of′or-on) [TA]
Remnants of the tubules and glomeruli of the lower part of the mesonephros appearing as a few scattered tubules in the broad ligament between the epoöphoron and the uterus. Its equivalent in the male is the paradidymis. SYN: parovarium. [para- + oophoron, ovary]

parorchidium (par-or-kid′e-um)
SYN: testis ectopia. [para- + G. orchis, testis]

parorchis (par-or′kis)
SYN: epididymis. [para- + G. orchis, testis]

parorexia (par-o-rek′se-a)
An abnormal or disordered appetite. [para- + G. orexis, appetite]

parosmia (par-oz′me-a)
SYN: dysosmia. [para + G. osme, sense of smell]

parosphresia (par-os-fre′ze-a)
SYN: dysosmia. [para- + G. osphresis, smell]

parosteal (par-os′te-al)
Relating to the tissues immediately adjacent to the periosteum of a bone.

parosteitis (par-os-te-i′tis)
Inflammation of the tissues immediately adjacent to a bone. SYN: parostitis. [para- + G. osteon, bone, + -itis, inflammation]

parosteosis, parostosis (par′os-te-o′sis, -os-to′sis)
1. Development of bone in an unusual location, as in the skin. 2. Abnormal or defective ossification. [para- + G. osteon, bone, + -osis, condition]

parostitis (par-os-ti′tis)
SYN: parosteitis.

parotic (pa-rot′ik)
Near or beside the ear. [para- + G. ous, ear]

parotid (pa-rot′id)
Situated near the ear; denoting several structures in this neighborhood. Usually refers to the p. salivary gland. [G. parotis (p.-), the gland beside the ear, fr. para, beside, + ous (ot-), ear]

parotidectomy (pa-rot′i-dek′to-me)
Surgical removal of the parotid gland. [parotid + G. ektome, excision]

parotiditis (pa-rot-i-di′tis)
Inflammation of the parotid gland. SYN: parotitis. epidemic p. SYN: mumps. postoperative p. an acute inflammation of the parotid gland occurring in the postoperative period, especially in debilitated or dehydrated patients; frequently results in abscess formation and rapidly spreading cellulitis that may become fatal. punctate p. recurrent or chronic p. with terminal sialectasis, giving a punctate pattern on sialography; associated with epithelial hyperplasia of intralobular ducts, atrophy of acini, and lymphocytic infiltration, characteristic in Sjögren disease.

parotidoauricularis (pa-rot′i-do-aw-rik-u-la′ris)
1. An occasional band of muscle fibers passing from the surface of the parotid gland to the auricle. 2. Relating to the parotid gland and the external ear.

parotin (par′o-tin)
A globulin obtained from parotid glands that causes hypocalcemia, has effects on mesenchymal tissues, produces first leukopenia and then leukocytosis, and promotes calcification of dentin. SYN: salivary gland hormone.

parotitis (par-o-ti′tis)
SYN: parotiditis.

parous (par′us)
Pertaining to parity. [L. pario, to bear]

parovarian (par-o-var′e-an)
1. Relating to the paroöphoron. 2. Beside or in the neighborhood of the ovary. SYN: paraovarian.

parovariotomy (par′o-var-e-ot′o-me)
Incision into or removal of a tumor of the parovarium. [parovarium + G. tome, incision]

parovaritis (par′o-var-i′tis)
Inflammation of the parovarium.

parovarium (par-o-var′e-um)
SYN: paroöphoron. [para- + L. ovarium, ovary]

paroxypropione (par-ok-si-pro′pe-on)
An inhibitor of pituitary gonadotropic hormone.

paroxysm (par′ok-sizm)
1. A sharp spasm or convulsion. 2. A sudden onset of a symptom or disease, especially one with recurrent manifestations such as the chills and rigor of malaria. [G. paroxysmos, fr. paroxyno, to sharpen, irritate, fr. oxys, sharp]

paroxysmal (par-ok-siz′mal)
Relating to or occurring in paroxysms.

parricide (par′i-sid)
1. The killing of one's parent (patricide or matricide). 2. One who commits such an act. [L. parricidium, killing of close kin]

Parrot
Jules, French physician, 1829–1883. See P. disease.

Parry
Caleb H., English physician, 1755–1822. See P. disease.

pars, pl .partes (pars, par′tez) [TA]
SYN: part. [L. p. (part-) a part] p. abdominalis aortae [TA] SYN: abdominal aorta. p. abdominalis ductus thoracici [TA] SYN: abdominal part of thoracic duct. p. abdominalis esophagi [TA] SYN: abdominal part of esophagus. p. abdominalis musculi pectorales majoris [TA] SYN: abdominal part of pectoralis major (muscle). p. abdominalis plexus visceralis et ganglii visceralis [TA] SYN: abdominal part of peripheral autonomic plexuses and ganglia. p. abdominalis ureteris [TA] SYN: abdominal part of ureter. p. acromialis musculi deltoidei [TA] SYN: acromial part of deltoid (muscle). p. alaris musculi nasalis [TA] SYN: alar part of nasalis muscle. See nasalis (muscle). p. alveolaris mandibulae [TA] SYN: alveolar part of mandible. p. amorpha the part of the nucleolus that occupies irregular spaces in the nucleolonema and contains finely filamentous substance. SEE ALSO: p. granulosa. p. anterior [TA] SYN: anterior part. p. anterior commissurae anterioris [TA] SYN: anterior part of anterior commissure of brain. p. anterior commissurae rostralis SYN: anterior part of anterior commissure of brain. p. anterior faciei diaphragmatis hepatis [TA] SYN: anterior part of diaphragmatic surface of liver. p. anterior fornicis vaginae [TA] SYN: anterior part of fornix of vagina. p. anterior linguae [TA] SYN: anterior part of tongue. p. anularis vaginae fibrosae digitorum manus et pedis [TA] SYN: anular part of fibrous digital sheath of digits of hand and foot. p. aryepiglottica musculi arytenoidei obliqui [TA] SYN: aryepiglottic part of oblique arytenoid muscle. p. ascendens aortae [TA] SYN: ascending aorta. p. ascendens duodeni [TA] SYN: ascending part of duodenum. p. ascendens musculi trapezii [TA] SYN: ascending part of trapezius (muscle). p. atlantica arteriae vertebralis [TA] SYN: atlantic part of vertebral artery. p. autonomica systematis nervosi peripherici [TA] SYN: autonomic division of nervous system. p. basalis [TA] SYN: basal part. p. basalis arteriarum lobarium inferiorum pulmonis sinistri et dextri [TA] SYN: basal part of left and right inferior pulmonary arteries. p. basalis arteriae pulmonalis right pulmonary artery, left pulmonary artery. p. basilaris [TA] SYN: basal part. p. basilaris pontis [TA] SYN: basilar part of pons. p. basilaris ossis occipitalis [TA] SYN: basilar part of occipital bone. p. buccopharyngea musculi constrictoris pharyngei superioris SYN: buccopharyngeal part of superior pharyngeal constrictor. See superior pharyngeal constrictor (muscle). p. canalis nervi optici [TA] SYN: part of optic nerve in canal. p. cardiaca gastricae [TA] SYN: cardia. p. cardiaca ventriculi SYN: cardia. p. cartilaginea septi nasi SYN: septal nasal cartilage. p. cartilaginea systematis skeletalis [TA] SYN: cartilaginous part of skeletal system. p. cartilaginea tubae auditivae [TA] SYN: cartilaginous part of pharyngotympanic (auditory) tube. p. cartilaginea tubae auditoriae SYN: cartilaginous part of pharyngotympanic (auditory) tube. p. cavernosa SYN: spongy urethra. p. cavernosa arteriae carotidis internae [TA] SYN: cavernous part of internal carotid artery. p. ceca retinae the embryologic anterior part of the retina that evolves into the p. ciliaris retinae and p. iridica retinae. p. centralis systematis nervosi [TA] SYN: central nervous system. p. centralis ventriculi lateralis [TA] the body of the lateral ventricle of the brain, extending from the interventricular foramen (of Monro) to the collateral trigone ( i.e., junction of posterior and inferior horns). SYN: body of lateral ventricle, cella media, central part of lateral ventricle. p. ceratopharyngea musculi constrictoris pharyngis medii [TA] SYN: ceratopharyngeal part of middle constrictor muscle of pharynx. See middle constrictor (muscle) of pharynx. p. cerebralis arteriae carotidis internae [TA] SYN: cerebral part of internal carotid artery. p. cervicalis arteriae carotidis internae [TA] SYN: cervical part of internal carotid artery. p. cervicalis arteriae vertebralis [TA] SYN: cervical part of vertebral artery. p. cervicalis ductus thoracici [TA] SYN: cervical part of thoracic duct. p. cervicalis esophagi [TA] SYN: cervical part of esophagus. p. cervicalis medullae spinalis [TA] SYN: cervical part of spinal cord. p. chondropharyngea musculi constrictoris pharyngei medii [TA] SYN: chondropharyngeal part of middle constrictor muscle of pharynx. See middle constrictor (muscle) of pharynx. p. ciliaris retinae [TA] SYN: ciliary part of retina. See retina. p. clavicularis musculi deltoidei [TA] SYN: clavicular part of deltoid (muscle). p. clavicularis musculi pectoralis majoris [TA] SYN: clavicular head of pectoralis major muscle. See pectoralis major (muscle). p. coccygea medullae spinalis [TA] SYN: coccygeal part of spinal cord. p. cochlearis nervi vestibulocochlearis SYN: cochlear nerve. p. coeliacoduodenalis musculi (ligamenti) suspensorii duodeni [TA] SYN: celiacoduodenal part of suspensory muscle (ligament) of duodenum. p. convoluta lobuli corticalis renis SYN: convoluted part of kidney lobule. p. corneoscleralis reticuli trabecularis sclerae [TA] SYN: corneoscleral part of trabecular tissue of sclera. partes corporis humani [TA] SYN: parts of human body, under part. p. corticalis SYN: cortical part. See middle cerebral artery, posterior cerebral artery. p. corticalis arteriae cerebralis mediae See terminal branches of middle cerebral artery, under branch. p. costalis diaphragmatis [TA] SYN: costal part of diaphragm. p. costalis pleurae parietalis [TA] SYN: costal part of parietal pleura. p. cranialis partis parasympathetici divisionis autonomici systematis nervosi [TA] SYN: cranial part of parasympathetic part of autonomic division of nervous system. p. craniocervicalis plexuum et gangliorum visceralium [TA] SYN: craniocervical part of peripheral autonomic plexuses and ganglia. p. cricopharyngea musculi constrictoris pharyngis inferioris [TA] SYN: cricopharyngeal part of inferior constrictor (muscle) of pharynx. See inferior constrictor (muscle) of pharynx. p. cruciformis vaginae fibrosae [TA] SYN: cruciform part of fibrous digital sheath. p. cuneiformis vomeris [TA] SYN: cuneiform part of vomer. p. cupularis recessus epitympanici [TA] SYN: cupular part of epitympanic recess. p. cystica the smaller caudal division of the primitive embryonic hepatic bud, developing into the gallbladder and cystic duct. p. descendens aortae [TA] SYN: descending aorta. p. descendens duodeni [TA] SYN: descending part of duodenum. See duodenum. p. descendens ligamenti iliofemoralis [TA] SYN: descending part of iliofemoral ligament. p. descendens musculi trapezii [TA] SYN: descending part of trapezius (muscle). p. dextra faciei diaphragmaticae hepatis [TA] SYN: right part of diaphragmatic surface of liver. p. diaphragmatica pleurae parietalis [TA] SYN: diaphragmatic part of parietal pleura. p. distalis adenohypophyseos [TA] SYN: distal part [TA] of anterior lobe of hypophysis. p. distalis prostatae [TA] SYN: distal part of prostate. p. distalis urethrae prostaticae [TA] SYN: distal part of prostatic urethra. partes dorsales musculorum intertransversariorum lateralium lumborum [TA] SYN: dorsal part of intertransversarii laterales lumborum (muscles). p. dorsalis pontis SYN: dorsal part of pons. p. duralis fili terminalis [TA] See terminal filum. p. endocrina pancreatis [TA] SYN: endocrine part of pancreas. See pancreas. p. exocrina pancreatis [TA] SYN: exocrine part of pancreas. See pancreas. p. extraocularis arteriae et venae centralis retinae [TA] SYN: extraocular part of central retinal artery and vein. p. fetalis placentae SYN: fetal placenta. p. flaccida membranae tympanae [TA] SYN: flaccid part of tympanic membrane. p. frontalis corporis callosi SYN: minor forceps. p. funicularis ductus deferentis [TA] SYN: funicular part of ductus deferens. partes genitales femininae externae outmoded term for external female genital organs, under organ. partes genitales masculinae externae outmoded term for external male genital organs, under organ. p. glossopharyngea musculi constrictoris pharyngis superioris SYN: glossopharyngeal part of superior pharyngeal constrictor. See superior pharyngeal constrictor (muscle). p. granulosa the granular and filamentous part of the nucleolonema of the nucleolus. p. hepatica the larger cranial division of the primitive embryonic hepatic bud, developing into the liver proper. p. hepatis dextra [TA] SYN: right liver. p. hepatis sinistra [TA] SYN: left liver. p. horizontalis duodeni [TA] SYN: inferior part of duodenum. See duodenum. p. iliaca fasciae iliopsoaticae [TA] SYN: iliac fascia. p. inferior [TA] SYN: inferior part. p. inferior alae lobuli centralis [TA] SYN: ala central lobule. p. inferior duodeni inferior part of duodenum. p. inferior ganglii vestibularis [TA] SYN: inferior part of vestibular ganglion. p. inferior venae lingularis venae pulmonalis superioris sinistrae [TA] SYN: inferior part of lingular vein (of left superior pulmonary vein). p. infraclavicularis plexus brachialis [TA] SYN: infraclavicular part of brachial plexus. p. infralobaris venae posterioris venae pulmonalis superioris dextrae [TA] SYN: infralobar part of posterior vein (of right superior pulmonary vein). p. infundibularis SYN: p. tuberalis. p. inguinalis ductus deferentis [TA] SYN: inguinal part of ductus deferens. p. insularis SYN: lobus insula. p. insularis arteriae cerebri mediae [TA] SYN: insular part of middle cerebral artery. See middle cerebral artery. p. interarticularis (in-ter-ar-tik′u-lar-is) the segment of bone between the superior and inferior articular facets, especially in the lumbar spine. p. intercartilaginea rimae glottidis [TA] SYN: intercartilaginous part of rima glottidis. p. intermedia [TA] SYN: intermediate part. p. intermedia adenohypophyseos [TA] SYN: intermediate part of adenohypophysis. p. intermedia commissurae bulborum SYN: commissure of bulbs. p. intermedia urethrae masculinae [TA] SYN: intermediate part of male urethra. p. intermembranacea rimae glottidis [TA] SYN: intermembranous part of rima glottidis. partes intersegmentales venarum pulmonum [TA] SYN: intersegmental vein. p. intracranialis arteriae vertebralis [TA] SYN: intracranial part of vertebral artery. See vertebral artery. p. intracranialis nervi optici [TA] SYN: intracranial part of optic nerve. p. intralaminaris nervi optici intralocularis [TA] SYN: intralaminar part of intralocular part of optic nerve. p. intralobaris (intersegmentalis) venae posterioris lobi superioris pulmonis dextri [TA] SYN: intralobar part of the posterior vein (of the right superior pulmonary vein). p. intramuralis urethrae masculinae [TA] SYN: intramural part of male urethra. p. intraocularis nervi optici [TA] SYN: intraocular part of optic nerve. p. intrasegmentalis venae pulmonum [TA] SYN: intrasegmental part of pulmonary veins. p. iridica retinae [TA] SYN: iridial part of retina. See retina. p. labialis musculi orbicularis oris [TA] SYN: labial part of orbicularis oris (muscle). p. lacrimalis musculi orbicularis oculi [TA] SYN: lacrimal part of orbicularis oculi muscle. See orbicularis oculi (muscle). p. laryngea pharyngis [TA] SYN: laryngopharynx. p. lateralis arcus pedis longitudinalis [TA] SYN: lateral part of longitudinal arch of foot. See longitudinal arch of foot. p. lateralis compartimenti antebrachii posterioris (extensorum) [TA] SYN: lateral part of posterior (extensor) compartment of forearm. p. lateralis fornicis vaginae [TA] SYN: lateral part of vaginal fornix. See vaginal fornix. p. lateralis musculorum intertransversariorum posteriorum cervicis [TA] See posterior cervical intertransversarii (muscles), under muscle. p. lateralis nuclei accumbentis [TA] See nucleus accumbens. p. lateralis ossis occipitalis [TA] SYN: lateral part of occipital bone. p. lateralis ossis sacri [TA] SYN: lateral part of sacrum. p. lateralis venae lobi medii venae pulmonalis dextri superioris SYN: lateral part of middle lobe vein (of right superior pulmonary vein). p. libera membri inferioris [TA] SYN: free part of lower limb. p. libera membri superioris [TA] SYN: free part of upper limb. p. lumbalis diaphragmatis [TA] SYN: lumbar part of diaphragm. p. lumbalis medullae spinalis [TA] SYN: lumbar part of spinal cord. p. marginalis musculi orbicularis oris [TA] SYN: marginal part of orbicularis oris (muscle). p. mastoidea ossis temporalis SYN: mastoid process of petrous part of temporal bone. p. medialis arcus pedis longitudinalis [TA] SYN: medial part of longitudinal arch of foot. See longitudinal arch of foot. p. medialis musculorum intertransversariorum posteriorum cervicis See posterior cervical intertransversarii (muscles), under muscle. p. medialis nuclei accumbentis [TA] See nucleus accumbens. p. medialis venae lobi medii venae pulmonis dextri superioris [TA] SYN: medial part of middle lobe vein (of right superior pulmonary vein). p. mediastinalis pleurae parietalis [TA] SYN: mediastinal part of parietal pleura. p. mediastinalis pulmonis SYN: mediastinal surface of lung. p. membranacea septi interventricularis [TA] SYN: membranous part of interventricular septum. p. membranacea septi nasi [TA] SYN: membranous part of nasal septum. p. membranacea urethrae masculinae intermediate part of male urethra. p. mobilis septi nasi [TA] SYN: mobile part of nasal septum. p. muscularis septi interventricularis (cordis) [TA] SYN: muscular part of interventricular septum (of heart). p. mylopharyngeus musculi constrictoris pharyngis superioris [TA] SYN: mylopharyngeal part of superior constrictor muscle of pharynx. See superior pharyngeal constrictor (muscle). p. nasalis ossis frontalis [TA] SYN: nasal part of frontal bone. p. nasalis pharyngis [TA] SYN: nasopharynx. p. nervosa hypophyseos neurohypophysis. p. nervosa retinae SYN: nervous part of retina. See retina. p. obliqua musculi cricothyroidei [TA] SYN: oblique part of cricothyroid (muscle). See cricothyroid muscle. p. occipitalis corporis callosi SYN: major forceps. p. olfactoria tunicae mucosae [TA] SYN: olfactory region of nasal mucosa. p. opercularis [TA] SYN: opercular part. p. optica retinae [TA] SYN: cerebral layer of retina. See retina. p. oralis pharyngis [TA] SYN: oropharynx. p. orbitalis [TA] SYN: orbital part [TA] of inferior frontal gyrus. p. orbitalis glandulae lacrimalis [TA] SYN: orbital part of lacrimal gland. See lacrimal gland. p. orbitalis musculi orbicularis oculi [TA] SYN: orbital part of orbicularis oculi (muscle) [TA] .orbicularis oculi (muscle). p. orbitalis nervi optici [TA] SYN: orbital part of optic nerve. p. orbitalis ossis frontalis [TA] SYN: orbital part of frontal bone. p. ossea septi nasi [TA] SYN: bony part of nasal septum. p. ossea systematis skeletalis [TA] SYN: bony part of skeletal system. p. ossea tubae auditivae [TA] SYN: bony part of pharyngotympanic (auditory) tube. p. ossea tubae auditoriae SYN: bony part of pharyngotympanic (auditory) tube. p. palpebralis glandulae lacrimalis [TA] SYN: palpebral part of lacrimal gland. See lacrimal gland. See lacrimal gland. p. palpebralis musculi orbicularis oculi [TA] SYN: palpebral part of orbicularis oculi (muscle). See orbicularis oculi (muscle). p. parasympathica divisionis automaticae systematis nervosi peripherici [TA] SYN: parasympathetic part of autonomic division of peripheral nervous system. p. patens arteriae umbilicalis [TA] SYN: patent part of umbilical artery. p. pelvica [TA] SYN: pelvic part. p. pelvica ductus deferentes [TA] SYN: pelvic part of ductus deferens. p. pelvica ureteris [TA] SYN: pelvic part of ureter. p. peripherica systematis nervosi [TA] SYN: peripheral nervous system. p. perpendicularis SYN: perpendicular plate. p. petrosa arteriae carotidis internae [TA] SYN: petrous part of internal carotid artery. See internal carotid artery. p. petrosa ossis temporalis [TA] SYN: petrous part of temporal bone. See temporal bone. p. phallica the lower portion of the urogenital sinus, related to the base of the genital tubercle. p. pharyngea hypophyseos SYN: pharyngeal hypophysis. p. phrenicocoeliaca musculi (ligamenti) suspensorii duodeni [TA] SYN: phrenicoceliac part of suspensory muscle (ligament) of duodenum. p. pialis fili terminalis [TA] SYN: pial part of filum terminale. p. pigmentosa SYN: pigmented part of retina. See retina. p. plana SYN: orbiculus ciliaris. p. postcommunicalis arteriae cerebri anterioris [TA] SYN: postcommunicating part of anterior cerebral artery. p. posterior commissurae anterioris [TA] SYN: posterior part of anterior commissure of brain. p. posterior faciei diaphragmatis hepatis [TA] SYN: posterior part of the diaphragmatic surface of the liver. p. posterior fornicis vaginae [TA] SYN: posterior part of vaginal fornix. p. posterior linguae [TA] SYN: posterior part of tongue. p. postlaminaris nervi optici intraocularis [TA] SYN: postlaminar part of intraocular part of optic nerve. p. postsulcalis linguae posterior part of tongue. p. precommunicalis arteriae cerebri anterioris [TA] SYN: precommunicating part of anterior cerebral artery. See anterior cerebral artery. p. precommunicalis arteriae cerebri posterioris [TA] SYN: precommunicating part of posterior cerebral artery. p. prelaminaris nervi optici intraocularis [TA] SYN: prelaminar part of intraocular part of optic nerve. p. preprostatica urethrae masculinae intramural part of male urethra. p. presulcalis anterior part of tongue. p. presulcalis linguae anterior part of tongue. p. prevertebralis arteriae prevertebralis [TA] SYN: prevertebral part of vertebral artery. See vertebral artery. p. proximalis prostatae [TA] SYN: proximal part of prostate. p. prima duodeni SYN: superior part of duodenum. p. profunda compartimenti antebrachii anterioris [TA] SYN: deep part of anterior compartment of forearm. p. profunda compartimenti cruris posterioris [TA] SYN: deep part of posterior (flexor) compartment of leg. p. profunda glandulae parotideae parotid gland. p. profunda glandulae parotidis [TA] SYN: deep part of parotid gland. p. profunda musculi masseteri [TA] SYN: deep part of masseter (muscle). p. profunda musculi sphincteri ani externi SYN: deep part of external anal sphincter. See external anal sphincter. p. profunda partis palpebralis musculi orbicularis oculi [TA] SYN: deep part of palpebral part of orbicularis oculi (muscle). p. prostatica urethrae [TA] SYN: prostatic urethra. p. proximalis urethrae prostaticae [TA] SYN: proximal part of prostatic urethra. p. psoatica fasciae iliopsoaticae [TA] SYN: psoatic part of iliopsoas fascia. p. pterygopharyngea musculi constrictoris pharyngis superioris SYN: pterygopharyngeal part of superior constrictor muscle of pharynx. See superior pharyngeal constrictor (muscle). p. pylorica gastris [TA] SYN: pyloric part of stomach. p. pylorica ventriculi SYN: pyloric part of stomach. p. quadrata hepatis SYN: anterior portion of left medial segment IV of liver. p. radiata lobuli corticalis renis SYN: medullary ray. p. recta musculi cricothyroidei cricothyroid muscle. p. respiratoria tunicae mucosae [TA] SYN: respiratory region of mucosa of nasal cavity. p. retrolentiformis capsulae internae [TA] SYN: retrolenticular part of internal capsule. p. retrolentiformis cruris posterior [TA] SYN: retrolentiform limb of internal capsule. p. sacralis medullae spinalis [TA] SYN: sacral part of spinal cord. p. scrotalis ductus deferentis [TA] SYN: scrotal part of ductus deferens. p. secundum duodeni SYN: descending part of duodenum. p. sellaris SYN: sella turcica. p. solealis compartimenti cruris posterioris [TA] SYN: soleal part of posterior (plantar flexor) compartment of leg. p. sphenoidalis arteriae cerebralis mediae [TA] SYN: sphenoid part of middle cerebral artery. See middle cerebral artery. p. spinalis fili terminalis [TA] SYN: spinal part of filum terminale. p. spinalis musculi deltoidei [TA] SYN: spinal part of deltoid (muscle). p. spinalis nervi accessorii spinal root of accessory nerve. p. spongiosa urethrae masculinae [TA] SYN: spongy urethra. p. squamosa ossis temporalis [TA] SYN: squamous part of temporal bone. p. sternalis diaphragmatis [TA] SYN: sternal part of diaphragm. p. sternocostalis musculi pectoralis majoris [TA] SYN: sternocostal head of pectoralis major (muscle). p. subcutanea musculi sphincteri ani externi [TA] SYN: subcutaneous part of external anal sphincter. See external anal sphincter. p. sublentiformis capsulae internae [TA] SYN: sublenticular part of internal capsule. p. sublentiformis cruris posterioris [TA] SYN: sublentiform limb of internal capsule. p. superficialis compartimenti antebrachii anterioris [TA] SYN: superficial part of anterior (flexor) compartment of forearm. p. superficialis compartimenti cruris posterioris [TA] SYN: superficial part of posterior (plantar flexor) compartment of leg. p. superficialis glandulae parotideae [TA] SYN: superficial part of parotid gland. See parotid gland. p. superficialis musculi masseteri [TA] SYN: superficial part of masseter muscle. See masseter (muscle). p. superficialis musculi sphincteri ani externi [TA] SYN: superficial part of external anal sphincter. See external anal sphincter. p. superior ali lobuli centralis [TA] SYN: ala central lobule. p. superior duodeni [TA] SYN: superior part of duodenum. p. superior faciei diaphragmaticae hepatis [TA] SYN: superior part of diaphragmatic surface of liver. p. superior ganglii vestibularis [TA] SYN: superior part of vestibular ganglion. p. superior venae lingularis venae pulmonis superioris sinistri [TA] SYN: superior part of lingular vein (of left superior pulmonary vein). p. supraclavicularis plexus brachialis [TA] SYN: supraclavicular part of brachial plexus. p. sympathica (divisionis autonomicae systematis nervosei peripherici) [TA] SYN: sympathetic part of autonomic division of peripheral nervous system. p. tecta obsolete term; p. tecta pancreatis, hidden portion of the pancreas; part of the pancreas covered by the root of the transverse mesocolon, the coalescence of the ascending mesocolon, and the root of the mesentery; p. tecta renalis, hidden portion of the kidney; part of the kidney covered by the root of the transverse mesocolon; p. tecta ureteralis, hidden portion of the ureter; part of the right ureter covered (crossed) by the root of the mesentery, and of the left ureter covered (crossed) by the root of the sigmoid mesocolon. SYN: hidden part. p. tecta duodeni SYN: hidden part of duodenum. p. tensa membranae tympani [TA] SYN: tense part of the tympanic membrane. p. terminalis See middle cerebral artery, posterior cerebral artery. SYN: terminal part. p. terminalis ilei [TA] SYN: terminal ileus. p. thoracica aortae [TA] SYN: thoracic aorta. p. thoracica ductus thoracici [TA] SYN: thoracic part of thoracic duct. See thoracic duct. p. thoracica esophagi [TA] SYN: thoracic part of esophagus. p. thoracica medullae spinalis [TA] SYN: thoracic part of spinal cord. p. thoracica muscularis iliocostalis lumborum [TA] SYN: thoracic part of iliocostalis lumborum (muscle). p. thoracica plexuum et ganglionorum visceralium [TA] SYN: thoracic part of peripheral autonomic plexuses and ganglia. p. thoracica tracheae [TA] SYN: thoracic part of trachea. p. thyroepiglottica musculi thyroarytenoidei [TA] SYN: thyroepiglottic part of thyroarytenoid (muscle). p. thyropharyngea musculi constrictoris pharyngis inferioris [TA] SYN: thyropharyngeal part of inferior constrictor muscle of pharynx. See inferior constrictor (muscle) of pharynx. p. tibiocalcanea ligamenti deltoidei tibiocalcaneal part of medial ligament of ankle joint. p. tibiocalcanea ligamenti collateralis medialis articulationis talocruralis [TA] SYN: tibiocalcaneal part of medial ligament of ankle joint. p. tibionavicularis ligamenti collateralis medialis articulationis talocrucalis [TA] SYN: tibionavicular part of medial ligament of ankle joint. p. tibiotalaris anterior ligamenti collateralis medialis articulationis talocruralis [TA] SYN: anterior tibiotalar part of medial ligament of ankle joint. p. tibiotalaris posterior ligamenti collateralis medialis articulationis talocruralis [TA] SYN: tibiotalar part of medial ligament of ankle joint. p. transversa ligamenti iliofemoralis [TA] SYN: transverse part of iliofemoral ligament. p. transversa musculi nasalis [TA] SYN: transverse part of nasalis muscle. See nasalis (muscle). p. transversa musculi trapezii [TA] SYN: transverse part of trapezius (muscle). p. transversa rami sinistri venae portae hepatis [TA] SYN: transverse part of left branch of portal vein. p. transversaria arteriae vertebralis vertebral artery. p. triangularis [TA] SYN: triangular part. p. tricipitalis compartimenti cruris posterioris superficial part of posterior (plantar flexor) compartment of leg. p. tuberalis [TA] the upward extension of the anterior lobe that wraps around the infundibular stalk; its cells, mostly gonadotropic, are arranged in cords and clusters; it is supplied by the superior hypophyseal arteries and contains the first capillary bed and the venules of a portal system that carries neurosecretory factors from the hypothalamus to a second capillary bed in the adenohypophysis where they regulate the release of hormones. SEE ALSO: pituitary gland. SYN: infundibular part, p. infundibularis. p. tympanica ossis temporalis [TA] SYN: tympanic plate of temporal bone. p. umbilicalis rami sinistri venae portae hepatis [TA] SYN: umbilical part of left branch of portal vein. p. uterina placentae the part of the placenta derived from the uterine tissue. SEE ALSO: placenta. SYN: maternal placenta, placenta uterina. p. uterina tubae uterinae [TA] SYN: uterine part of uterine tube. p. uvealis reticuli trabecularis sclerae [TA] SYN: uveal part of trabecular tissue of sclera. p. vagalis nervi accessorii cranial root of accessory nerve. p. ventralis musculi intertransversarii lateralium lumborum [TA] SYN: ventral part of intertransversarii laterales lumborum (muscles). p. ventralis pontis SYN: basilar part of pons. p. vertebralis faciei costalis pulmonis [TA] SYN: vertebral part of the costal surface of the lungs. p. vestibularis nervi vestibulocochlearis SYN: vestibular nerve.

pars-planitis (parz′pla-ni′tis)
A clinical syndrome consisting of inflammation of the peripheral retina and/or pars plana, exudation into the overlying vitreous base, and edema of the optic disk and adjacent retina.

part
A portion. SYN: pars [TA] . abdominal p. of aorta SYN: abdominal aorta. abdominal p. of esophagus [TA] the portion of the esophagus from where it passes through the diaphragm to the stomach. See esophagus. SYN: pars abdominalis esophagi [TA] , epicardia. abdominal p. of pectoralis major (muscle) [TA] portion of pectoralis major originating from the rectus sheath. SYN: pars abdominalis musculi pectorales majoris [TA] . abdominal p. of peripheral autonomic plexuses and ganglia [TA] portion of the autonomic nervous system (networks composed largely of autonomic nerve fibers—but also including visceral afferent fibers—and ganglia associated with blood vessels and organs) that occur both retro- and intraperitoneally in the abdominal cavity. SYN: pars abdominalis plexus visceralis et ganglii visceralis [TA] . abdominal p. of thoracic duct [TA] the p. of the thoracic duct between the cisterna chyli and the aortic hiatus of the diaphragm. SYN: pars abdominalis ductus thoracici [TA] . abdominal p. of ureter [TA] the p. of the ureter between the renal pelvis and the brim of the pelvis. SYN: pars abdominalis ureteris [TA] . acromial p. of deltoid (muscle) [TA] portion of deltoid (muscle) originating from the acromion. SYN: pars acromialis musculi deltoidei [TA] . alar p. of nasalis muscle [TA] See nasalis (muscle). SYN: pars alaris musculi nasalis [TA] . alveolar p. of mandible [TA] the portion of the body of the mandible that surrounds and supports the lower teeth. SYN: pars alveolaris mandibulae [TA] . anterior p. [TA] the portion of a structure that lies most forward, or closest to the front surface relative to other parts; in human anatomy, the ventral portion of a structure. see anterior p. of: anterior commissure of brain; guadrangular lobule of cerebellum; central lobule of cerebellum; culmen; lateral parabranchial nucleus; diaphragmatic surface of liver; tongue; formix of vagina. SYN: pars anterior [TA] . anterior p. of anterior commissure of brain [TA] the anterior p. of the anterior or rostral commissure of the brain; SYN: pars anterior commissurae anterioris [TA] , pars anterior commissurae rostralis. anterior p. of diaphragmatic surface of liver [TA] the p. of the diaphragmatic surface of the liver deep to the costal arches and the xiphoid process. SYN: pars anterior faciei diaphragmatis hepatis [TA] . anterior p. of fornix of vagina [TA] the portion of the fornix of the vagina anterior to the uterine cervix. SYN: pars anterior fornicis vaginae [TA] . anterior p. of pons SYN: basilar p. of pons. anterior tibiotalar p. of deltoid ligament SYN: anterior tibiotalar p. of medial ligament of ankle joint. anterior tibiotalar p. of medial ligament of ankle joint [TA] the p. of the medial or deltoid ligament that extends from the medial malleolus to the neck of the talus. SYN: pars tibiotalaris anterior ligamenti collateralis medialis articulationis talocruralis [TA] , anterior talotibial ligament, anterior tibiotalar ligament, anterior tibiotalar p. of deltoid ligament, ligamentum mediale, ligamentum talotibiale anterius. anterior p. of tongue [TA] portion of the tongue (≈2/3) anterior to the sulcus terminalis, distinct from the posterior p. in embryologic origin and innervation. SYN: pars anterior linguae [TA] , pars presulcalis linguae&star, pars presulcalis&star, presulcal p. of tongue&star. anular p. of fibrous digital sheath of digits of hand and foot [TA] one of the five circular fibrous bands or pulleys (A1–A5) of the fibrous sheaths of the fingers and the corresponding structures of the toes attached to the shaft of the proximal and middle phalanges and associated joint capsules. SYN: pars anularis vaginae fibrosae digitorum manus et pedis [TA] , anular pulley, anulus of fibrous sheath, ligamentum anulare digitorum. aryepiglottic p. of oblique arytenoid muscle [TA] fibers of the oblique arytenoid muscle that continue past the summit of the arytenoid cartilage to the side of the epiglottis; action, constricts the laryngeal aperture in a “purse-string” manner. SYN: pars aryepiglottica musculi arytenoidei obliqui [TA] , aryepiglottic muscle, musculus aryepiglotticus. ascending p. of aorta SYN: ascending aorta. ascending p. of duodenum [TA] the terminal or fourth p. of the duodenum, ascending from the horizontal p. to the jejunum. SYN: pars ascendens duodeni [TA] . ascending p. of trapezius (muscle) [TA] lower third of trapezius that ascends to insert on the spine of the scapula; acts independently of other parts to depress scapula (lower shoulders); acts with other parts to retract and rotate scapula. SYN: pars ascendens musculi trapezii [TA] , inferior p. of trapezius (muscle)&star. atlantic p. of vertebral artery [TA] suboccipital p. of vertebral artery. See vertebral artery. SYN: pars atlantica arteriae vertebralis [TA] , suboccipital p. of vertebral artery. autonomic p. of peripheral nervous system autonomic division of nervous system. basal p. [TA] portion of a structure which forms its base—the bottom p. or p. opposite the apex of the structure—or a branch serving that portion of the structure; e.g., the basal p. of the lungs (formed by the four basal bronchopulmonary segments of each side) served by basal parts of the right and left pulmonary arteries. SYN: basilar parts [TA] , pars basalis [TA] , pars basilaris [TA] . basal p. of left and right inferior pulmonary arteries [TA] See right pulmonary artery, left pulmonary artery. SYN: pars basalis arteriarum lobarium inferiorum pulmonis sinistri et dextri [TA] . See right pulmonary artery, left pulmonary artery. basal p. of occipital bone SYN: basilar p. of occipital bone. basilar parts [TA] SYN: basal p.. basilar p. of occipital bone [TA] the wedgelike p. of the occipital bone that lies anterior to the foramen magnum and joins with the body of the sphenoid bone. SYN: pars basilaris ossis occipitalis [TA] , basal p. of occipital bone, basilar apophysis, basilar process of occipital bone, basilar process, basiocciput. basilar p. of pons [TA] the large bulbous portion of the pons seen on the ventral portion of the brainstem and ventral to the medial lemniscus in a cross section: contains longitudinally oriented fibers (corticospinal, corticopontine, corticoreticular, and others) and the transversely oriented pontocerebellar fibers. SYN: pars basilaris pontis [TA] , pons basilaris pontis [TA] , anterior p. of pons, pars ventralis pontis, ventral p. of pons. bony p. of external acoustic meatus the medial two-thirds of the external acoustic meatus, that is formed as the tympanic plate of the temporal bone develops; it extends approximately 16 mm from its junction with the cartilaginous p. to the tympanic membrane. bony p. of nasal septum [TA] the major portion of the nasal septum including (supported by) the vomer and the perpendicular plate of the ethmoid. SYN: pars ossea septi nasi [TA] . bony p. of pharyngotympanic (auditory) tube [TA] the portion of the pharyngotympanic (auditory) tube formed by the petrous p. of the temporal bone passing from the tympanic cavity anteromedially through the semicanal for auditory tube. SYN: pars ossea tubae auditivae [TA] , pars ossea tubae auditoriae. bony p. of skeletal system [TA] portion of the skeleton composed of cortical, compact, or spongy bone. SYN: pars ossea systematis skeletalis [TA] , osseous p. of skeletal system. buccopharyngeal p. of superior pharyngeal constrictor See superior pharyngeal constrictor (muscle). SYN: pars buccopharyngea musculi constrictoris pharyngei superioris. cardiac p. of stomach SYN: cardia. cardial p. of stomach SYN: cardia. cartilaginous p. of external acoustic meatus the lateral third of the external acoustic meatus, which is continuous with the auricular cartilage and attached to the circumference of the bony p.. cartilaginous p. of nasal septum [TA] portion of the nasal septum supported by cartilage (instead of bone). cartilaginous p. of pharyngotympanic (auditory) tube that portion of the auditory tube that is supported by cartilage; it continues anteromedially from the osseous p. to open into the nasopharynx. SYN: pars cartilaginea tubae auditivae [TA] , pars cartilaginea tubae auditoriae. cartilaginous p. of skeletal system [TA] the p. of the skeleton composed of cartilage. SYN: pars cartilaginea systematis skeletalis [TA] . cavernous p. of internal carotid artery [TA] the more tortuous portion of the internal carotid artery that traverses the cavernous sinus; it has numerous small branches. SYN: pars cavernosa arteriae carotidis internae [TA] . celiacoduodenal p. of suspensory muscle (ligament) of duodenum [TA] fibromuscular band of smooth muscle passing from the terminal duodenum and duodenojejunal flexure to end in connective tissue in the vicinity of the celiac trunk. SYN: pars coeliacoduodenalis musculi (ligamenti) suspensorii duodeni [TA] . central p. of lateral ventricle SYN: pars centralis ventriculi lateralis. ceratopharyngeal p. of middle constrictor muscle of pharynx [TA] See middle constrictor (muscle) of pharynx. SYN: pars ceratopharyngea musculi constrictoris pharyngis medii [TA] , ceratopharyngeal p. of middle pharyngeal constrictor (muscle) of pharynx. ceratopharyngeal p. of middle pharyngeal constrictor (muscle) of pharynx SYN: ceratopharyngeal p. of middle constrictor muscle of pharynx. cerebral p. of arachnoid SYN: cranial arachnoid mater. cerebral p. of dura mater SYN: cranial dura mater. cerebral p. of internal carotid artery [TA] the portion of the internal carotid artery that lines in contact with and directly supplies the brain; its branches are: superior hypophyseal, clival, ophthalmic, anterior choroidal, anterior cerebral, and middle cerebral. SYN: pars cerebralis arteriae carotidis internae [TA] . cervical p. of esophagus [TA] the p. of the esophagus located in the neck. See esophagus. SYN: pars cervicalis esophagi [TA] . cervical p. of internal carotid artery [TA] the unbranched portion located in the neck. SYN: pars cervicalis arteriae carotidis internae [TA] . cervical p. of spinal cord [TA] the p. of the spinal cord located in the neck consisting of eight cervical segments [C1–C8] and giving rise to the first eight pairs of spinal nerves [C1–C8]. SYN: pars cervicalis medullae spinalis [TA] , segmenta cervicalia medullae spinalis [TA] , segmenta medullae spinalis cervicalia C1–C8 [TA] , cervical segments of spinal cord [C1–C8]&star, segmenta cervicalia C1–C5. cervical p. of thoracic duct [TA] the portion of the thoracic duct above the first rib. SYN: pars cervicalis ductus thoracici [TA] . cervical p. of vertebral artery [TA] portion of vertebral artery that traverses the transverse foramina of cervical vertebrae C1–C6 and gives rise to spinal and muscular branches. SYN: pars cervicalis arteriae vertebralis [TA] , transversarial p. of vertebral artery [TA] . chondropharyngeal p. of middle constrictor muscle of pharynx [TA] See middle constrictor (muscle) of pharynx. SYN: pars chondropharyngea musculi constrictoris pharyngei medii [TA] , chondropharyngeal p. of middle pharyngeal constrictor (muscle) of pharynx. chondropharyngeal p. of middle pharyngeal constrictor (muscle) of pharynx SYN: chondropharyngeal p. of middle constrictor muscle of pharynx. ciliary p. of retina [TA] See retina. SYN: pars ciliaris retinae [TA] . clavicular p. of deltoid (muscle) [TA] anterior portion of the deltoid originating from the clavicle; acts independently of other parts to contribute to flexion at the shoulder joint. SYN: pars clavicularis musculi deltoidei [TA] . clavicular p. of pectoralis major (muscle) SYN: clavicular head of pectoralis major muscle. See pectoralis major (muscle). coccygeal p. of spinal cord [TA] the terminal p. of the spinal cord consisting of the three coccygeal segments of the spinal cord from which the three pairs of coccygeal nerves originate. SYN: pars coccygea medullae spinalis [TA] , segmenta coccygea medullae spinalis [TA] . cochlear p. of vestibulocochlear nerve SYN: cochlear nerve. convoluted p. of kidney lobule proximal and distal convoluted tubules and the associated renal corpuscles supplied by branches of the interlobular arteries. SYN: labyrinthus, Ludwig labyrinth, pars convoluta lobuli corticalis renis, renal labyrinth. corneoscleral p. of trabecular tissue of sclera [TA] the anterior p. of the trabecular reticulum, located between the sinus venosus sclerae, the scleral spur, and the posterior limiting membrane of the cornea. SYN: pars corneoscleralis reticuli trabecularis sclerae [TA] . cortical p. SYN: pars corticalis.middle cerebral artery, posterior cerebral artery. cortical p. of middle cerebral artery See middle cerebral artery. costal p. of diaphragm [TA] the p. of the diaphragm that arises from the inner aspect of the lower six costal cartilages and the lower four ribs and inserts on the anterolateral p. of the central tendon. SYN: pars costalis diaphragmatis [TA] . costal p. of parietal pleura [TA] portion of the parietal pleura that lines the internal aspect of the ribs and intercostal muscles. SYN: pars costalis pleurae parietalis [TA] , costal pleura, pleura costalis. cranial p. of parasympathetic p. of autonomic division of nervous system [TA] the roots and branches of the parasympathetic ganglia (ciliary, pterygopalatine, otic, and submandibular/sublingual) of the head. SYN: pars cranialis partis parasympathetici divisionis autonomici systematis nervosi [TA] . craniocervical p. of peripheral autonomic plexuses and ganglia [TA] networks of postsynaptic sympathetic nerve fibers accompanying the carotid arteries and branches thereof within the head and neck. SYN: pars craniocervicalis plexuum et gangliorum visceralium [TA] . cricopharyngeal p. of inferior constrictor (muscle) of pharynx [TA] See inferior constrictor (muscle) of pharynx. SYN: pars cricopharyngea musculi constrictoris pharyngis inferioris [TA] , cricopharyngeus muscle&star. cruciform p. of fibrous digital sheath [TA] the fibers of the fibrous sheath of the fingers and toes that constitute three X-shaped pulleys (C1–C3) over the proximal and middle phalanx. SYN: pars cruciformis vaginae fibrosae [TA] , crucial ligament (4) , cruciform p. of fibrous sheath, cruciform pulley, ligamenta cruciata digitorum. cruciform p. of fibrous sheath SYN: cruciform p. of fibrous digital sheath. cuneiform p. of vomer [TA] the wedge-shaped thin anterior portion of the vomer. SYN: pars cuneiformis vomeris [TA] . cupular p. of epitympanic recess [TA] the dome-shaped, highest portion of the epitympanic recess. SYN: pars cupularis recessus epitympanici [TA] . deep p. of anterior compartment of forearm [TA] portion of anterior (flexor) compartment of forearm that includes the flexor pollicis longus, flexor digitorum profundus, and pronator quadratus muscle. SYN: pars profunda compartimenti antebrachii anterioris [TA] . deep p. of external anal sphincter [TA] See external anal sphincter. SYN: pars profunda musculi sphincteri ani externi. deep p. of flexor retinaculum SYN: flexor retinaculum. deep p. of masseter (muscle) [TA] See masseter (muscle). SYN: pars profunda musculi masseteri [TA] . deep p. of palpebral p. of orbicularis oculi (muscle) [TA] portion of the palpebral p. of orbicularis oculi arising from the posterior aspect of the medial palpebral ligament and adjacent bone. SYN: pars profunda partis palpebralis musculi orbicularis oculi [TA] . deep p. of parotid gland [TA] that portion of the parotid salivary gland that is located behind the mandible and occupies the space between the ramus of the mandible and the mastoid process extending as far medially as the pharyngeal wall. SYN: pars profunda glandulae parotidis [TA] , processus retromandibularis glandulae parotidis, processus retromandibularis, retromandibular process of parotid gland. See parotid gland. deep p. of posterior (flexor) compartment of leg [TA] portion of posterior (flexor) compartment of leg including flexor digitorum longus, flexor hallucis longus, and tibialis posterior (muscles). SYN: pars profunda compartimenti cruris posterioris [TA] . descending p. of aorta SYN: descending aorta. descending p. of duodenum [TA] See duodenum. SYN: pars descendens duodeni [TA] , pars secundum duodeni, second p. of duodenum. descending p. of facial canal second portion of the facial canal, after the horizontal parts, beginning at the posterior end of the lateral crus where the canal begins to descend. It runs vertically downward, ending at the stylomastoid foramen. Anteriorly, the descending p. of the facial canal communicates with the tympanic cavity via the canaliculus for the nerve to the stapedius muscle and the posterior canaliculus of the chorda tympani. SEE ALSO: facial canal. descending p. of iliofemoral ligament [TA] the more vertical of the limbs of the inverted Y-shaped iliofemoral ligament (vs. the more horizontal transverse p.). SYN: pars descendens ligamenti iliofemoralis [TA] . descending p. of trapezius (muscle) [TA] the upper third of the trapezius (muscle) that descends to insert on the clavicle and acromion; acting independently of the other parts, it acts to elevate the scapula (shrug shoulders). SYN: pars descendens musculi trapezii [TA] . diaphragmatic p. of parietal pleura [TA] portion of the outer (parietal) layer of pleura that lines the superior aspect of the diaphragm on each side of the pericardium. SYN: pars diaphragmatica pleurae parietalis [TA] , diaphragmatic pleura, phrenic pleura, pleura diaphragmatica, pleura phrenica. distal p. of prostate [TA] portion of the prostate derived from the more caudal anlage; includes the right, left, and posterior lobes of prostate. SYN: pars distalis prostatae [TA] . distal p. of prostatic urethra [TA] portion of prostatic urethra inferior to the merging of the urinary and genital tracts at the openings of the ejaculatory ducts. SYN: pars distalis urethrae prostaticae [TA] . distal p. [TA] of anterior lobe of hypophysis the larger p. of the adenohypophysis composed of cords of epithelial cells individually specialized to secrete various tropic hormones that exert their effect on several target organs in the body. The secretory activity of these cells is under the control of either releasing or inhibiting factors elaborated by hypothalamic neurons and transported to the adenohypophysis by the hypothalamo-hypophysial portal system. SYN: pars distalis adenohypophyseos [TA] . dorsal p. of intertransversarii laterales lumborum (muscles) [TA] portion of the lateral intertransversarii of the lumbar region connecting the accessory processes of one vertebra to the transverse processes of the vertebra above. SYN: partes dorsales musculorum intertransversariorum lateralium lumborum [TA] . dorsal p. of pons the p. of the pons bounded laterally by the middle cerebellar peduncles and anteriorly by the ventral p. of pons; it is continuous with the tegmentum of the mesencephalon and contains long tracts such as the medial and lateral lemnisci, cranial nerve nuclei, and reticular formation. SYN: tegmentum of pons [TA] , tegmentum pontis [TA] , pars dorsalis pontis. dural p. of filum terminale [TA] the threadlike termination of the spinal dura mater, surrounding and fused to the filum terminale of the cord, and attached to the deep dorsal sacrococcygeal ligament; extends from S2–3 to Co2 vertebral levels. SEE ALSO: terminal filum. SYN: coccygeal ligament&star, filum terminale externum&star, filum durae matris spinalis, filum of spinal dura mater. endocrine p. of pancreas [TA] See pancreas. SYN: pars endocrina pancreatis [TA] . exocrine p. of pancreas [TA] See pancreas. SYN: pars exocrina pancreatis [TA] . extraocular p. of central retinal artery and vein [TA] orbital portion of central retinal artery and vein external (posterior) to the eyeball. SYN: pars extraocularis arteriae et venae centralis retinae [TA] . first p. of duodenum SYN: superior p. of duodenum. flaccid p. of tympanic membrane [TA] triangular loose p. of tympanic membrane between the malleolar folds. SYN: pars flaccida membranae tympanae [TA] , flaccid membrane, membrana flaccida, Rivinus membrane, Shrapnell membrane. free p. of lower limb [TA] portion of the appendicular skeleton of the lower limb distal to the hip joint; the pelvic girdle is excluded. SYN: pars libera membri inferioris [TA] . free p. of upper limb [TA] portion of the appendicular skeleton of the upper limb distal to the shoulder joint; the pectoral girdle is not included. SYN: pars libera membri superioris [TA] . frontal p. of corpus callosum SYN: minor forceps. funicular p. of ductus deferens [TA] portion of the ductus deferens contained within the spermatic cord. SYN: pars funicularis ductus deferentis [TA] . glossopharyngeal p. of superior pharyngeal constrictor See superior pharyngeal constrictor (muscle). SYN: pars glossopharyngea musculi constrictoris pharyngis superioris. hidden p. SYN: pars tecta. hidden p. of duodenum the p. of duodenum covered by the root of the transverse mesocolon, the coalescence of the ascending mesocolon, and the root of the mesentery. SYN: pars tecta duodeni. horizontal p. of duodenum inferior p. of duodenum. See duodenum. horizontal p. of facial canal first portion of facial canal, between beginning of canal (at the introitus of the facial canal at the end of the internal auditory meatus) and the point at which it turns to descend, beginning the descending p.. There are two components (crura) of the horizontal p.: the medially located, anteriorly directed medial crus and the laterally placed, posteriorly directed lateral crus, the two being continuous at a sharp bend, the genu of the facial canal. This lateral p. is where the genicular ganglion is located and communicates with the middle cranial fossa via the hiatus of the facial canal, through which the greater superficial petrosal nerve passes. parts of human body [TA] the head, neck, trunk, limbs, and cavities. SYN: partes corporis humani [TA] . inferior p. [TA] the lowermost portion of a structure relative to the other parts; portion closest to the soles of the feet. see inferior p. of: duodenum, lingular branch of left pulmonary vein, and vestibular ganglion. SYN: pars inferior [TA] . inferior p. of duodenum [TA] third section of duodenum inferior to head of pancreas that lies between the superior mesenteric vessels anteriorly and the aorta and inferior vena cava posteriorly. SYN: pars horizontalis duodeni [TA] , horizontal p. of duodenum&star, pars inferior duodeni&star, third p. of duodenum. inferior p. of lingular vein (of left superior pulmonary vein) [TA] the vein draining the inferior lingular bronchopulmonary segment of the left lung. SYN: pars inferior venae lingularis venae pulmonalis superioris sinistrae [TA] . inferior p. of trapezius (muscle) ascending p. of trapezius (muscle). inferior p. of vestibular ganglion [TA] the lower p. of the vestibular ganglion that receives fibers from the macula of the saccule and the ampulla of the posterior semicircular duct. SYN: pars inferior ganglii vestibularis [TA] . inferior p. of vestibulocochlear nerve SYN: cochlear nerve. infraclavicular p. of brachial plexus [TA] the p. of the brachial plexus that extends from the level of the clavicle downward into the axilla; it includes the cords of the plexus and their branches. SYN: pars infraclavicularis plexus brachialis [TA] . infralobar p. of posterior vein (of right superior pulmonary vein) [TA] the vein draining the posterior segment of the right lung that emerges inferior to the superior lobe; tributary to the posterior branch of the right superior pulmonary vein. SYN: pars infralobaris venae posterioris venae pulmonalis superioris dextrae [TA] . infrasegmental p. SYN: intersegmental vein. infundibular p. SYN: pars tuberalis. inguinal p. of ductus deferens [TA] portion of ductus deferens located within the inguinal canal, i.e., between superficial and deep inguinal rings. SYN: pars inguinalis ductus deferentis [TA] . insular p. SYN: lobus insula. insular p. of middle cerebral artery [TA] See middle cerebral artery. SYN: pars insularis arteriae cerebri mediae [TA] . intercartilaginous p. of glottic opening SYN: intercartilaginous p. of rima glottidis. intercartilaginous p. of rima glottidis [TA] the opening between the vocal processes of the arytenoid cartilages; this p. is open during whispering and is closed during phonation and the Valsalva maneuver. SYN: pars intercartilaginea rimae glottidis [TA] , glottis respiratoria, intercartilaginous p. of glottic opening. intermediate p. [TA] central portion; the portion located between extreme portions of a structure; an interposed or intervening p.. See intermediate p. of adenohypophysis, intermediate p. of male urethra. SYN: pars intermedia [TA] . intermediate p. of adenohypophysis [TA] the p. of the adenohypophysis located between the pars distalis and the nervous lobe; poorly developed in humans. SYN: pars intermedia adenohypophyseos [TA] . intermediate p. of male urethra [TA] the shortest and narrowest portion of the male urethra, about 1 cm in length, extending from the prostate to the beginning of the urethra in the corpus spongiosum just beyond the bulb. SYN: pars intermedia urethrae masculinae [TA] , membranous urethra&star, pars membranacea urethrae masculinae&star, membranous p. of male urethra. intermediate p. of vestibular bulb SYN: commissure of bulbs. intermembranous p. of glottic opening SYN: intermembranous p. of rima glottidis. intermembranous p. of rima glottidis [TA] the portion of the opening anterior to the vocal processes of the arytenoid cartilages bounded by the vocal ligaments; this portion is closed by contraction of the lateral cricoarytenoid (muscle) only during whispering. SYN: pars intermembranacea rimae glottidis [TA] , glottis vocalis, intermembranous p. of glottic opening. intersegmental p. of pulmonary vein [TA] SYN: intersegmental vein. intracranial p. of optic nerve [TA] the portion of the optic nerve between the optic canal and the optic chiasm. SYN: pars intracranialis nervi optici [TA] . intracranial p. of vertebral artery [TA] See vertebral artery. SYN: pars intracranialis arteriae vertebralis [TA] . intralaminar p. of intralocular p. of optic nerve [TA] the portion of the intraocular p. of the optic nerve as it passes through the lamina cribrosa of the sclera. SYN: pars intralaminaris nervi optici intralocularis [TA] . intralobar p. of the posterior vein (of the right superior pulmonary vein) [TA] the vein draining the apical and posterior segments of the right lung; tributary to the posterior branch of the right superior pulmonary vein. SYN: pars intralobaris (intersegmentalis) venae posterioris lobi superioris pulmonis dextri [TA] . intramural p. of male urethra [TA] initial portion of male urethra traversing the wall (floor) of the bladder. SYN: pars intramuralis urethrae masculinae [TA] , pars preprostatica urethrae masculinae&star, preprostatic p. of male urethra&star. intraocular p. of optic nerve [TA] the p. of the optic nerve within the eyeball; it is divided into intralaminar, postlaminar, and prelaminar parts. SYN: pars intraocularis nervi optici [TA] . intrasegmental p. of pulmonary veins [TA] a vein emerging from the bronchopulmonary segment it drains; a tributary to a branch of a pulmonary vein. SYN: pars intrasegmentalis venae pulmonum [TA] , intrasegmental veins. iridial p. of retina [TA] See retina. SYN: pars iridica retinae [TA] . labial p. of orbicularis oris (muscle) [TA] the major p. of the orbicularis oris muscle within the body of the lips. SYN: pars labialis musculi orbicularis oris [TA] . lacrimal p. of orbicularis oculi muscle [TA] p. of orbicularis oculi (muscle) arising from lacrimal bone. See orbicularis oculi (muscle). SYN: pars lacrimalis musculi orbicularis oculi [TA] , Duverney muscle, Horner muscle, musculus tensor tarsi. laryngeal p. of pharynx SYN: laryngopharynx. lateral p. of longitudinal arch of foot [TA] portion of longitudinal arch of foot formed by the calcaneus, cuboid, and lateral two metatarsals (N–V); it is lower and less mobile than the medial p.; it functions in the transmission of weight while the medial p. of the arch functions to absorb the shock of the foot in locomotion. SYN: pars lateralis arcus pedis longitudinalis [TA] . lateral p. of middle lobe vein (of right superior pulmonary vein) [TA] the vein draining the lateral bronchopulmonary segment of the middle lobe of the right lung. SYN: pars lateralis venae lobi medii venae pulmonalis dextri superioris. lateral p. of occipital bone [TA] the p. of the occipital bone that lies on either side of the foramen magnum. SYN: pars lateralis ossis occipitalis [TA] , exoccipital bone. lateral p. of posterior cervical intertransversarii (muscles) posterior cervical intertransversarii (muscles), under muscle. lateral p. of posterior (extensor) compartment of forearm [TA] portion of the posterior fascial compartment of the forearm that includes the “lateral wad” muscles; brachioradialis and extensors radialis. SYN: pars lateralis compartimenti antebrachii posterioris (extensorum) [TA] , radial p. of posterior compartment of forearm&star. lateral p. of sacrum [TA] the mass of the sacrum lateral to the sacral foramina formed by the fused costal elements. SYN: pars lateralis ossis sacri [TA] . lateral p. of vaginal fornix [TA] See vaginal fornix. SYN: pars lateralis fornicis vaginae [TA] . left p. of liver left liver. lumbar p. of diaphragm [TA] the portion of the diaphragm that arises from the upper lumbar vertebrae and from the medial and lateral arcuate ligaments. See right crus of diaphragm, left crus of diaphragm, lateral arcuate ligament, medial arcuate ligament. SYN: pars lumbalis diaphragmatis [TA] , vertebral p. of diaphragm. lumbar p. of spinal cord [TA] portion of spinal cord that consists of the five lumbar segments (L1–L5) and from which five pairs of lumbar spinal nerves originate; in the adult it is located in the T10–L1 portion of the vertebral canal, and is enlarged relative to other parts of the cord because of its involvement in innervation of the lower limb. SYN: pars lumbalis medullae spinalis [TA] , lumbar segments L1–L5 of spinal cord, segmenta lumbalia L1–L5, segmenta lumbalia medullae spinalis. marginal p. of orbicularis oris (muscle) [TA] the p. of the orbicularis oris muscle located in the margin of the lips, i.e., the red area. SYN: pars marginalis musculi orbicularis oris [TA] . mastoid p. of the temporal bone SYN: mastoid process of petrous p. of temporal bone. medial p. of longitudinal arch of foot [TA] portion of longitudinal arch of foot formed by the calcaneus, talus, mavicular, cuneiforms, and medial metatarsals [I–III]. See longitudinal arch of foot. SYN: pars medialis arcus pedis longitudinalis [TA] . See longitudinal arch of foot. medial p. of middle lobe vein (of right superior pulmonary vein) [TA] the vein draining the medial bronchopulmonary segment of the middle lobe of the right lung. SYN: pars medialis venae lobi medii venae pulmonis dextri superioris [TA] . mediastinal p. of lung SYN: mediastinal surface of lung. mediastinal p. of parietal pleura [TA] the continuation of the costal and diaphragmatic pleura of each side that passes from the vertebral column and sternum covering the sides of the mediastinum. SYN: pars mediastinalis pleurae parietalis [TA] , mediastinal pleura, pleura mediastinalis. membranous p. of interventricular septum [TA] p. of the fibrous skeleton of the heart that is seen as a small, thin, round or oval nonmuscular area at the superior end of the interventricular septum; it lies just below and is continuous with the portion of the fibrous ring of the aortic valve supporting the anterior and posterior cusps, and with the right fibrous trigone; the atrioventricular bundle of conducting tissue courses along its dorsal margin and bifurcates at its inferior margin into the right and left crura. SYN: pars membranacea septi interventricularis [TA] , membranous septum (2) , septum membranaceum ventriculorum. membranous p. of male urethra SYN: intermediate p. of male urethra. membranous p. of nasal septum [TA] the small portion of the nasal septum anterior and inferior to the portion supported by the cartilage of the nasal septum. SYN: pars membranacea septi nasi [TA] , membranous septum (1) . mobile p. of nasal septum [TA] the anteroinferior movable p. of the nasal septum formed by the membranous p. and the medial crus of the greater alar cartilage on each side. SYN: pars mobilis septi nasi [TA] , septum mobile nasi. muscular p. of interventricular septum (of heart) [TA] the thick muscular portion that composes most of the interventricular septum of the heart. SYN: pars muscularis septi interventricularis (cordis) [TA] , septum musculare ventriculorum. mylopharyngeal p. of superior constrictor muscle of pharynx [TA] See superior pharyngeal constrictor (muscle). SYN: pars mylopharyngeus musculi constrictoris pharyngis superioris [TA] , mylopharyngeal p. of superior pharyngeal constrictor (muscle) of pharynx. mylopharyngeal p. of superior pharyngeal constrictor (muscle) of pharynx SYN: mylopharyngeal p. of superior constrictor muscle of pharynx. nasal p. of frontal bone [TA] nasal portion of the frontal bone which lies between the two orbital parts anteriorly and forms p. of the roof of the nasal cavity. SYN: pars nasalis ossis frontalis [TA] . nasal p. of pharynx SYN: nasopharynx. nervous p. of retina SYN: optic p. of retina. SYN: pars nervosa retinae. neural p. of hypophysis SYN: neurohypophysis. oblique p. of cricothyroid (muscle) [TA] See cricothyroid muscle. SYN: pars obliqua musculi cricothyroidei [TA] . occipital p. of corpus callosum SYN: major forceps. opercular p. [TA] one of the three small cortical convolutions together forming a cover for the insular region. Opercular convolutions are frontal, temporal, and parietal. SYN: pars opercularis [TA] . p. of optic nerve in canal [TA] the p. of the optic nerve lying within the optic canal. SYN: pars canalis nervi optici [TA] . optic p. of retina [TA] See retina. SYN: nervous p. of retina. oral p. of pharynx SYN: oropharynx. orbital p. of frontal bone [TA] the portion of the frontal bone that contributes to the formation of the orbits. SYN: pars orbitalis ossis frontalis [TA] . orbital p. of lacrimal gland [TA] See lacrimal gland. SYN: pars orbitalis glandulae lacrimalis [TA] . orbital p. of optic nerve [TA] the p. of the optic nerve between the eyeball and the optic canal, i.e., within the orbit. SYN: pars orbitalis nervi optici [TA] . orbital p. of orbicularis oculi (muscle) [TA] SYN: pars orbitalis musculi orbicularis oculi. See orbicularis oculi (muscle). orbital p. [TA] of inferior frontal gyrus the rostral and slightly ventral portion of the inferior frontal gyrus. SYN: pars orbitalis [TA] . osseous p. of skeletal system SYN: bony p. of skeletal system. palpebral p. of lacrimal gland [TA] See lacrimal gland. SYN: pars palpebralis glandulae lacrimalis [TA] . palpebral p. of orbicularis oculi (muscle) [TA] See orbicularis oculi (muscle). SYN: pars palpebralis musculi orbicularis oculi [TA] . parasympathetic p. of autonomic division of peripheral nervous system [TA] the presynaptic (preganglionic) autonomic neurons having cell bodies located in the brain, associated with the motor nuclei of certain cranial nerves [CN III, VII, IX, and X], or in the gray matter of spinal cord segments S2–S4, and the postsynaptic neurons with which the presynaptic fibers connect (synapse); in the head, there are four discrete parasympathetic ganglia: ciliary, pterygopalatine, otic, and submandibular/sublingual; in the trunk, the postsynaptic cells occur as isolated intrinsic ganglia. See autonomic division of nervous system. SYN: pars parasympathica divisionis automaticae systematis nervosi peripherici [TA] , bulbosacral system, craniosacral division of autonomic nervous system, craniosacral nervous system. patent p. of umbilical artery [TA] portion of umbilical artery between its origin as a branch of the internal iliac artery and its postnatal occlusion distal to the origin of the superior vesicle arteries. SYN: pars patens arteriae umbilicalis [TA] . pelvic p. [TA] the portion of a structure that is located within or is related to the pelvis. see pelvic p. of ductus deferens, of parasympathetic p. of autonomic division of nervous system, and of ureter. SYN: pars pelvica [TA] . pelvic p. of ductus deferens [TA] portion of ductus deferens extending between the deep inguinal ring and the ampulla. SYN: pars pelvica ductus deferentes [TA] . pelvic p. of peripheral autonomic plexuses and ganglia [TA] portion of the autonomic nerve plexuses which extend into and lie within the lesser pelvis, i.e., inferior to the plane of the pelvic inlet; included are the superior and inferior hypogastric plexuses, and the plexuses of the pelvic viscera: middle and inferior rectal, vesical, uterovaginal, prostatic and deferential; although technically they exit the pelvis and course within the erectile bodies of the perineum, the cavernous nerves of the penis and clitoris are also included. SYN: pars pelvica plexus visceralis et ganglii visceralis [TA] . pelvic p. of ureter [TA] the p. of the ureter between the brim of the pelvis and the urinary bladder. SYN: pars pelvica ureteris [TA] . pelvic p. of the urogenital sinus the upper pelvic portion of the embryologic urogenital sinus. peripheral p. of nervous system SYN: peripheral nervous system. petrous p. of internal carotid artery [TA] the p. of the internal carotid artery in the carotid canal; its branches are carotidotympanic arteries and the artery of the pterygoid canal. SYN: pars petrosa arteriae carotidis internae [TA] , petrous bone. petrous p. of temporal bone [TA] the p. of the temporal bone that contains the structures of the inner ear and the second p. of the internal carotid artery; in antenatal life it appears as a separate ossification center. SYN: pars petrosa ossis temporalis [TA] , periotic bone, petrosal bone, petrous pyramid. phrenicoceliac p. of suspensory muscle (ligament) of duodenum [TA] slip of skeletal muscle arising from the right crus of the diaphragm near the esophageal hiatus and joining the celiacoduodenal p. to attach to the terminal duodenum and duodenojejunal flexure. SYN: pars phrenicocoeliaca musculi (ligamenti) suspensorii duodeni [TA] . pial p. of filum terminale [TA] portion of the filum terminale within the dural sac; it is composed of a prolongation of the pia caudal to the termination of the spinal cord at the tip of the conus medullaris. SEE ALSO: terminal filum. SYN: pars pialis fili terminalis [TA] , filum terminale internum&star, pial filament&star. pigmented p. of retina SYN: pars pigmentosa.retina. postcommunicating p. of anterior cerebral artery [TA] portion of anterior cerebral artery distal to the anterior communicating artery. SYN: pars postcommunicalis arteriae cerebri anterioris [TA] , A2 segment of anterior cerebral artery&star, segmentum A2 arteriae cerebri anterioris&star. postcommunicating p. of posterior cerebral artery [TA] portion of posterior cerebral artery distal to the posterior communicating artery. SYN: pars postcommunicalis arteriae cerebri posterioris [TA] , P2 segment of posterior cerebral artery&star. posterior p. [TA] the posterior portion of the anterior commissure of the brain. posterior p. of anterior commissure of brain [TA] major, posterior portion of the connection between the paired olfactory bulbs and adjacent portions of the cortex of the frontal and temporal lobes. SYN: pars posterior commissurae anterioris [TA] . posterior p. of the diaphragmatic surface of the liver [TA] that portion of the diaphragmatic surface of the liver that includes the bare area and the caudate lobe. SYN: pars posterior faciei diaphragmatis hepatis [TA] . posterior p. of liver posterior hepatic segment I. posterior tibiotalar p. of deltoid ligament SYN: tibiotalar p. of medial ligament of ankle joint. posterior tibiotalar p. of medial ligament of ankle joint [TA] See medial ligament of ankle joint. posterior p. of tongue [TA] portion (posterior third) of tongue that lies posterior to the terminal sulcus, it is distinct from the anterior p. (anterior two-thirds) of tongue in both its embryologic origin and its innervation. SEE ALSO: dorsum of tongue. SYN: pars posterior linguae [TA] , pars postsulcalis linguae&star, postsulcal p. of tongue&star. posterior p. of vaginal fornix [TA] SYN: pars posterior fornicis vaginae [TA] . postlaminar p. of intraocular p. of optic nerve [TA] the portion of the intraocular p. of the optic nerve immediately posterior to the lamina cribrosa of the sclera. SYN: pars postlaminaris nervi optici intraocularis [TA] . postsulcal p. of tongue posterior p. of tongue. precommunicating p. of anterior cerebral artery [TA] portion of anterior cerebral artery proximal to the anterior communicating artery. SYN: pars precommunicalis arteriae cerebri anterioris [TA] , A1 segment of anterior cerebral artery&star, segmentum A1 arteriae cerebri anterioris&star, precommunical segment of anterior cerebral artery. precommunicating p. of posterior cerebral artery [TA] portion of posterior cerebral artery proximal to the posterior communicating artery. SYN: pars precommunicalis arteriae cerebri posterioris [TA] , P1 segment of posterior cerebral artery, precommunical segment of posterior cerebral artery. prelaminar p. of intraocular p. of optic nerve [TA] the portion of the intraocular p. of the optic nerve immediately anterior to the lamina cribrosa of the sclera. SYN: pars prelaminaris nervi optici intraocularis [TA] . preprostatic p. of male urethra intramural p. of male urethra. presulcal p. of tongue anterior p. of tongue. prevertebral p. of vertebral artery [TA] See vertebral artery. SYN: pars prevertebralis arteriae prevertebralis [TA] . proximal p. of prostate [TA] portion of prostate derived from the more rostral anlage; includes anterior and middle lobes of mature prostate. SYN: pars proximalis prostatae [TA] . proximal p. of prostatic urethra [TA] portion of prostatic urethra superior to the merging of the urinary and genital tracts at the openings of the ejaculatory ducts. SYN: pars proximalis urethrae prostaticae [TA] . psoatic p. of iliopsoas fascia [TA] portion of the fascia overlying the iliopsoas (muscle), the specific portion directly related to the psoatic portion. SYN: pars psoatica fasciae iliopsoaticae [TA] . pterygopharyngeal p. of superior constrictor muscle of pharynx [TA] See superior pharyngeal constrictor (muscle). SYN: pars pterygopharyngea musculi constrictoris pharyngis superioris. pyloric p. of stomach [TA] that portion of the stomach between the angular notch and the pylorus; its mucosa contains pyloric glands. SYN: pars pylorica gastris [TA] , pars pylorica ventriculi. quadrate p. of liver [TA] SYN: anterior portion of left medial segment IV of liver. radial p. of posterior compartment of forearm lateral p. of posterior (extensor) compartment of forearm. retrolenticular p. of internal capsule that portion of the capsule caudal to the lentiform nucleus that contains occipitopontine fibers [TA], occipitiotectal fibers [TA], optic radiations [TA] (geniculocalcarine fibers [TA], posterior thalamic radiation [TA], and other fiber systems. SEE ALSO: retrolenticular limb of internal capsule. SYN: pars retrolentiformis capsulae internae [TA] . right p. of diaphragmatic surface of liver [TA] the p. of the diaphragmatic surface of the liver deep to the bodies of the lower ribs on the right side. SYN: pars dextra faciei diaphragmaticae hepatis [TA] . right p. of liver right liver. sacral p. of spinal cord [TA] the p. of the cord from which consists of the five sacral segments of the spinal cord (S1–S5) and from which five pairs of sacral nerves originate. SYN: pars sacralis medullae spinalis [TA] , segmenta sacralia medullae spinalis [TA] . scrotal p. of ductus deferens [TA] initial portion of ductus deferens, between the epididymis and the spermatic cord, as the ductus runs parallel to the epididymis and the testis. SYN: pars scrotalis ductus deferentis [TA] . second p. of duodenum SYN: descending p. of duodenum. soft parts the nonbony and noncartilaginous tissues of the body. soleal p. of posterior (plantar flexor) compartment of leg [TA] portion of posterior osteofascial compartment of leg that includes the soleus muscle. SYN: pars solealis compartimenti cruris posterioris [TA] . sphenoid p. of middle cerebral artery [TA] See middle cerebral artery. SYN: pars sphenoidalis arteriae cerebralis mediae [TA] . spinal p. of accessory nerve spinal root of accessory nerve. spinal p. of arachnoid SYN: spinal arachnoid mater. spinal p. of deltoid (muscle) [TA] portion of deltoid (muscle) originating from the spine of the scapula. SYN: pars spinalis musculi deltoidei [TA] . spinal p. of filum terminale [TA] initial (superiormost) portion of filum terminale at the tip of the conus medullaris that still includes a central canal. SYN: pars spinalis fili terminalis [TA] . spongy p. of the male urethra SYN: spongy urethra. squamous p. of frontal bone [TA] the broad, curved portion of the frontal bone forming the forehead. SYN: squama frontalis [TA] . squamous p. of occipital bone [TA] the tabular or squamous portion of occipital bone. SYN: squama occipitalis, occipital squama [TA] , frontal squama. squamous p. of temporal bone [TA] the broad, flat, thin (scale-like) anterior and superior portion of the temporal bone forming p. of the lateral wall of the cranial vault. SYN: pars squamosa ossis temporalis [TA] , squama temporalis, temporal squama. sternal p. of diaphragm [TA] the small slip on each side that arises from the inner surface of the xiphoid process and inserts on the central tendon. SYN: pars sternalis diaphragmatis [TA] . sternocostal p. of pectoralis major muscle SYN: sternocostal head of pectoralis major (muscle). See pectoralis major (muscle). straight p. of cricothyroid muscle [TA] See cricothyroid muscle. subcutaneous p. of external anal sphincter [TA] See external anal sphincter. SYN: pars subcutanea musculi sphincteri ani externi [TA] , subcutaneous portion of external anal sphincter. sublenticular p. of internal capsule the p. of the internal capsule below the caudal third of the lentiform nucleus that contains the acoustic radiation [TA] (geniculotemporal fibers [TA]), corticotectal fibers [TA], temporopontine fibers [TA], and corticothalamic fibers as well as that p. of the optic radiation representing the upper p. of the contralateral half of the binocular visual field. SEE ALSO: sublentiform limb of internal capsule. SYN: pars sublentiformis capsulae internae [TA] . suboccipital p. of vertebral artery SYN: atlantic p. of vertebral artery. superficial p. of anterior (flexor) compartment of forearm [TA] portion of anterior (flexor) compartment of forearm including the superficial (and intermediate) layers of pronator and flexor muscles: pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris, and flexor digitorum superficialis. SYN: pars superficialis compartimenti antebrachii anterioris [TA] . superficial p. of external anal sphincter [TA] See external anal sphincter. SYN: pars superficialis musculi sphincteri ani externi [TA] . superficial p. of masseter muscle [TA] See masseter (muscle). SYN: pars superficialis musculi masseteri [TA] . superficial p. of parotid gland [TA] See parotid gland. SYN: pars superficialis glandulae parotideae [TA] . superficial p. of posterior (plantar flexor) compartment of leg [TA] portion of posterior (plantar flexor) compartment of leg including the gastrocnemius and soleus (muscles); it is separated from the deep p. by the transverse intermuscular septum of leg. SYN: pars superficialis compartimenti cruris posterioris [TA] , pars tricipitalis compartimenti cruris posterioris&star. superior p. of diaphragmatic surface of liver [TA] the convex superior portion of the diaphragmatic surface of the liver. SYN: pars superior faciei diaphragmaticae hepatis [TA] . superior p. of duodenum initial (first) p. of duodenum immediately distal to the pylorus and proximal to the descending (second) p.. See duodenum. SYN: pars superior duodeni [TA] , first p. of duodenum, pars prima duodeni. See duodenum. superior p. of lingular vein (of left superior pulmonary vein) [TA] the vein that drains the superior lingular bronchopulmonary segment of the left lung. SYN: pars superior venae lingularis venae pulmonis superioris sinistri [TA] . superior p. of vestibular ganglion [TA] rostral p., the superior p. of the vestibular ganglion that receives fibers from the maculae of the utricle and the saccule and the ampullae of the anterior and lateral semicircular ducts. SYN: pars superior ganglii vestibularis [TA] . superior p. of vestibulocochlear nerve SYN: vestibular nerve. supraclavicular p. of brachial plexus [TA] the p. of the brachial plexus that lies superior to the clavicle; it includes the roots, trunks, and divisions that give rise to the dorsal scapular, long thoracic, suprascapular and subclavian nerves. SYN: pars supraclavicularis plexus brachialis [TA] . supravaginal p. of cervix [TA] the p. of the cervix of the uterus lying above the attachment of the vagina. SYN: portio supravaginalis cervicis [TA] . sympathetic p. of autonomic division of peripheral nervous system [TA] the sympathetic p. of the autonomic division of the nervous system. SEE ALSO: autonomic division of nervous system. SYN: pars sympathica (divisionis autonomicae systematis nervosei peripherici) [TA] , sympathetic nervous system, thoracolumbar nervous system. tense p. of the tympanic membrane [TA] the greater portion of the tympanic membrane that is tense and firm, contrasting with the small triangular flaccid p. of tympanic membrane. SYN: pars tensa membranae tympani [TA] , membrana tensa, membrana vibrans. terminal p. SYN: pars terminalis. See terminal branches of middle cerebral artery, under branch, posterior cerebral artery. third p. of duodenum SYN: inferior p. of duodenum. thoracic p. of aorta SYN: thoracic aorta. thoracic p. of esophagus [TA] the p. of the esophagus between the superior thoracic aperture and the diaphragm. SYN: pars thoracica esophagi [TA] . thoracic p. of iliocostalis lumborum (muscle) [TA] portion of the iliocostalis muscle which extends superiorly from the costal angles of the lower six ribs to the costal angles of the upper six ribs and the transverse process of vertebra C7, between iliocostalis lumborum inferiorly and laterally and iliocostalis cervicis superiorly and medially. SYN: pars thoracica muscularis iliocostalis lumborum [TA] . thoracic p. of peripheral autonomic plexuses and ganglia [TA] autonomic plexuses of the thoracic viscera: heart/aorta, lungs/bronchi, and esophagus, and associated parasympathetic ganglia. SYN: pars thoracica plexuum et ganglionorum visceralium [TA] . thoracic p. of spinal cord [TA] the p. of the spinal cord that consists of the twelve thoracic segments [T1–T12] of the spinal cord from which the twelve pairs of thoracic nerves [T1–T12] originate. SYN: pars thoracica medullae spinalis [TA] , segmenta thoracica medullae spinalis [TA] . thoracic p. of thoracic duct [TA] portion of the thoracic duct within the thorax, from aortic hiatus to the level of the first thoracic vertebra. SYN: pars thoracica ductus thoracici [TA] . thoracic p. of trachea [TA] portion of trachea that lies within the thorax, that is, the portion between the plane of the superior thoracic aperture above and the bifurcation of the trachea at the level of the sternal angle below. SYN: pars thoracica tracheae [TA] . thyroepiglottic p. of thyroarytenoid (muscle) [TA] intrinsic muscle of larynx; origin, inner surface of thyroid cartilage in common with the thyroarytenoideus muscle; insertion, aryepiglottic fold and margin of epiglottis; action, depresses base of epiglottis; nerve supply, recurrent laryngeal. SYN: pars thyroepiglottica musculi thyroarytenoidei [TA] , depressor muscle of epiglottis, musculus thyroepiglotticus, thyroepiglottic muscle, thyroepiglottidean muscle, ventricularis (2) . thyropharyngeal p. of inferior constrictor muscle of pharynx [TA] See inferior constrictor (muscle) of pharynx. SYN: pars thyropharyngea musculi constrictoris pharyngis inferioris [TA] , thyropharyngeal p. of inferior pharyngeal constrictor (muscle) of pharynx. thyropharyngeal p. of inferior pharyngeal constrictor (muscle) of pharynx SYN: thyropharyngeal p. of inferior constrictor muscle of pharynx. tibiocalcaneal p. of deltoid ligament tibiocalcaneal p. of medial ligament of ankle joint. tibiocalcaneal p. of medial ligament of ankle joint [TA] the p. of the medial or deltoid ligament that extends from the medial malleolus to the sustentaculum tali of the calcaneus. SYN: pars tibiocalcanea ligamenti collateralis medialis articulationis talocruralis [TA] , pars tibiocalcanea ligamenti deltoidei&star, tibiocalcaneal p. of deltoid ligament&star, calcaneotibial ligament, ligamentum calcaneotibiale, tibiocalcaneal ligament. tibionavicular p. of deltoid ligament SYN: tibionavicular p. of medial ligament of ankle joint. tibionavicular p. of medial ligament of ankle joint [TA] the p. of the medial or deltoid ligament that extends from the medial malleolus to the navicular bone. SEE ALSO: medial ligament of ankle joint. SYN: pars tibionavicularis ligamenti collateralis medialis articulationis talocrucalis [TA] , ligamentum tibionaviculare, tibionavicular ligament, tibionavicular p. of deltoid ligament. tibiotalar p. of medial ligament of ankle joint [TA] the p. of the medial or deltoid ligament that extends from the medial malleolus to the posterior process of the talus. SYN: pars tibiotalaris posterior ligamenti collateralis medialis articulationis talocruralis [TA] , ligamentum talotibiale posterius, posterior talotibial ligament, posterior tibiotalar ligament, posterior tibiotalar p. of deltoid ligament. transversarial p. of vertebral artery [TA] SYN: cervical p. of vertebral artery. transverse p. of iliofemoral ligament [TA] the more horizontal limb of the inverted Y-shaped iliofemoral ligament. SYN: pars transversa ligamenti iliofemoralis [TA] . transverse p. of left branch of portal vein [TA] the long unbranched portion of the left branch of the portal vein. SYN: pars transversa rami sinistri venae portae hepatis [TA] . transverse p. of nasalis muscle [TA] See nasalis (muscle). SYN: pars transversa musculi nasalis [TA] . transverse p. of trapezius (muscle) [TA] middle third of trapezius with muscle fibers running transversely to the spine of the scapula; acts to retract the scapulae (shoulders) at the conceptual scapulothoracic joint. SYN: pars transversa musculi trapezii [TA] . triangular p. [TA] the middle one of three small convolutions that together compose the inferior frontal gyrus of the cerebral cortex, the other two being the orbital p. and opercular p.. SYN: pars triangularis [TA] . tympanic p. of temporal bone SYN: tympanic plate of temporal bone. umbilical p. of left branch of portal vein [TA] the highly branched p. of the left branch of the portal vein; the round and venous ligaments attach to this p.. SYN: pars umbilicalis rami sinistri venae portae hepatis [TA] . uterine p. of uterine tube [TA] the p. of the uterine tube located within the wall of the uterus. SYN: pars uterina tubae uterinae [TA] . uveal p. of trabecular reticulum SYN: uveal p. of trabecular tissue of sclera. uveal p. of trabecular tissue of sclera [TA] the posterior p. of the trabecular reticulum, located between the scleral spur, the ciliary body, and the anterior surface of the iris. SYN: pars uvealis reticuli trabecularis sclerae [TA] , uveal p. of trabecular reticulum. vagal p. of accessory nerve cranial root of accessory nerve. See accessory nerve [CN XI]. vaginal p. of cervix [TA] the p. of the cervix uteri contained within the vagina. SYN: portio vaginalis cervicis [TA] . ventral p. of intertransversarii laterales lumborum (muscles) [TA] portions of the lateral intertransversarii of the lumbar region connecting the costal elements of the transverse processes of the lumbar vertebrae. SYN: pars ventralis musculi intertransversarii lateralium lumborum [TA] . ventral p. of pons SYN: basilar p. of pons. vertebral p. of the costal surface of the lungs [TA] the p. of the medial surface of the lung in contact with the vertebral bodies. SYN: pars vertebralis faciei costalis pulmonis [TA] . vertebral p. of diaphragm SYN: lumbar p. of diaphragm. vestibular p. of vestibulocochlear nerve SYN: vestibular nerve.

part. aeq.
Abbreviation for L. partes aequales, in equal parts (amounts).

partes (par′tez)
Plural of pars.




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