|Medical Dictionary - Dictionary of Medicine and Human Biology|
A relatively short polypeptide chain with a molecular weight of about 35,000 daltons and a high number of cysteine residues that is found in antibodies of the IgM and IgA classes.
Mathieu, French surgeon, 1860–1913. See J. pyloroplasty, J. amputation.
François Sigismond, French physician, 1830–1913. See J. arthritis, J. arthropathy.
1. A fixed bandage applied around the body in order to immobilize the spine. 2. In dentistry, a term commonly used in reference to an artificial crown composed of fired porcelain or acrylic resin. [M.E., fr. O.Fr. jaquet, dim. of jaque, tunic, fr. Jacques, nickname of Fr. peasants.] Minerva j. a plaster of Paris body cast incorporating the head and trunk, usually for fracture of the cervical spine.
A threaded device used in appliances for the separation of approximated teeth or jaws.
John Hughlings, English neurologist, 1835–1911. See jacksonian epilepsy, J. law, J. rule, J. sign.
Jabez N., U.S. surgeon, 1868–1935. See J. membrane, J. veil.
Described by John Hughlings Jackson. See j. epilepsy, j. seizure.
Hans C., Swedish surgeon, 1879–1937. See J. operation.
Ludwig L., Danish anatomist, 1783–1843. See J. anastomosis, J. canal, J. cartilage, J. nerve, J. organ, J. plexus, J. reflex.
Henri, 19th century French physician. See J. facial angle.
Marcel, French anatomist, 1872–1908. See J. recess.
Emile, 19th century French chemist. See J. test.
Paul, 19th century French physician. See J. plexus.
Josef, German dermatologist in Switzerland, 1863–1936; introduced the patch test for contact dermatitis. See J. nevus, Borst-J. type intraepidermal epithelioma, J.-Pellizzari anetoderma, Franceschetti-J. syndrome, J.-Lewandowski syndrome.
Eduard, Ritter von Jaxthal, Austrian ophthalmologist, 1818–1884. See J. test types.
Max, German biochemist, 1841–1911. See J. reaction, J. test.
Henry L., U.S. pathologist, 1896–1979 See J.-Lichtenstein disease.
Alfons M., German neuropsychiatrist, 1884–1931. See Creutzfeldt-J. disease.
The dried tuberous root of Exogonium purga, E. jalapa, or Ipomoea purga (family Convolvulaceae); used as a cathartic. [Jalapa or Xalapa, a Mexican city from where the drug was exported]
Thomas N., U.S. cardiologist and physiologist, *1925. See J. fibers, under fiber, J. tracts, under tract.
George C.W., U.S. radiologist, 1915–1972. See Swyer-J. syndrome, Swyer-J.-MacLeod syndrome.
SYN: Datura stramonium.
Pierre M.F., French neurologist, 1859–1947. See J. test.
Edward G., U.S. physician, 1841–1911. See J. lesion.
Conjoined twins having their two heads fused together, with the faces looking in opposite directions. See conjoined twins, under twin. SEE ALSO: craniopagus, syncephalus. [L. Janus, a Roman diety having two faces, + caput, head] j. asymmetrus a j. with one very small and imperfectly developed face. SYN: iniops, syncephalus asymmetros. j. parasiticus a j. in which one of the twins is a small and incompletely formed parasite attached to the more fully formed autosite.
Albert, German otologist, 1859–1933. See J. operation.
Jan, Czech physician, 1873–1921. See J.-Bielschowsky disease, J. classification.
Janus green B [C.I. 11050]
A basic dye used in histology and to stain mitochondria supravitally.
1. To jolt or shake. 2. A jolting or shaking. heel j. the patient standing on tiptoe feels pain on suddenly bringing the heels to the ground: 1. in the spine in Pott disease or disk space infection; 2. in one lumbar region in renal calculus.
Language or terminology peculiar to a specific field, profession, or group. SEE ALSO: paraphasia. [Fr. gibberish]
Adolf, Austrian dermatologist, 1850–1902. See J.-Herxheimer reaction, Bezold-J. reflex.
Brian, 20th century British Primary Care physician. See J. score.
Robert Koffler, U.S. cardiologist. See J. artificial heart.
A genus of plants of the family Euphorbiaceae; a poisonous plant found in eastern Africa and the West Indies. [G. iatros, physician, + trophe, nourishment] J. curcas barbados nut or physic-nut, the seed of which furnishes a purgative oil similar to croton oil. SYN: J. glandulifera. J. glandulifera SYN: J. curcas. J. urens a species of South America; the macerated fresh leaves are used as a rubefacient and stimulating poultice; the seeds furnish a purgative oil.
1. One of the two bony structures, in which the teeth are set, forming the framework of the mouth. 2. Common name for either the maxillae or the mandible. [A.S. ceowan, to chew] crackling j. chronic subluxation with clicking on motion. Hapsburg j. prognathism and pouting lower lip, characteristic of the Hispano-Austrian imperial dynasty. j. winking a paradoxical movement of eyelids associated with movements of the j.. lock-j. SYN: trismus. lower j. SYN: mandible. lumpy j. SYN: actinomycosis. parrot j. a condition caused by protrusion of incisor teeth. upper j. SYN: maxilla.
Walery, Polish physician, 1849–1924. See J. bodies, under body.
Edouard, French dermatologist, 1858–1935. See J. nodules, under nodule.
Harold, U.S. physician, *1904. See Peutz-J. syndrome, J.-Peutz syndrome.
Relating to the jejunum.
Excision of all or a part of the jejunum. [jejunum + G. ektome, excision]
Inflammation of the jejunum.
The jejunum, jejunal. [L. jejunus, empty]
An anastomosis between the jejunum and the colon. [jejuno- + colon + G. stoma, mouth]
Relating to the jejunum and the ileum.
Inflammation of the jejunum and ileum.
An anastomosis between the jejunum and the ileum. [jejuno- + ileum + G. stoma, mouth]
An anastomosis between two portions of jejunum. [jejuno- + jejuno- + G. stoma, mouth]
A corrective surgical procedure on the jejunum. [jejuno- + G. plastos, molded]
Operative establishment of a fistula from the jejenum to the abdominal wall, usually with creation of a stoma. [jejuno- + G. stoma, mouth]
Incision into the jejunum. [jejuno- + G. tome, incision]
jejunum (je-joo′num) [TA]
The portion of small intestine, about 8 feet in length, between the duodenum and the ileum. The j. is distinct from the ileum in being more proximal, of larger diameter with a thicker wall, having larger, more highly developed plicae circulares, being more vascular (redder in appearance), with the jejunal arteries forming fewer tiers of arterial arcades and longer vasa recta. [L. jejunus, empty]
Edward J., British physician specializing in alcohol-related disorders, 1890–1963. See J. formula.
1. A semisolid tremulous compound usually containing some form of gelatin in aqueous solution. 2. SYN: jellyfish. [L. gelo, to freeze] box j. SYN: Chiropsalmus quadrumanus. cardiac j. term introduced by C.L. Davis for the gelatinous, noncellular material between the endothelial lining and the myocardial layer of the heart in very young embryos; later in development it serves as a substratum for cardiac mesenchyme. interlaminar j. term introduced by B.M. Patten for the gelatinous material between ectoderm and endoderm that serves as the substrate on which mesenchymal cells migrate. Wharton j. the mucous connective tissue of the umbilical cord.
Marine coelenterates (class Hydrozoa) including some poisonous species, notably Physalia, the Portuguese man-of-war; toxin is injected into the skin by nematocysts on the tentacles, causing linear wheals. SYN: jelly (2) .
Ernö, Hungarian physician, 1858–1921. See J. maneuver.
Edward, 1749–1823; English physician and naturalist who discovered the method of vaccinating against smallpox by inoculating susceptible persons with cowpox (vaccinia); J. method led directly to the eradication of smallpox worldwide in 1977, the greatest public health achievement ever.
Harley D., Canadian physician, *1907. See J.-Kay unit.
Louis, English physician, 1866–1904. See J. stain.
E.R., 20th century U.S. statistcian. See Levey-J. chart.
Edmund Z., Danish ophthalmologist, 1861–1950. See J. disease.
Carl O., Danish veterinary surgeon and pathologist, 1864–1934. See J. sarcoma.
1. A sudden pull. 2. SYN: deep reflex. ankle j. SYN: Achilles reflex. chin j. SYN: jaw reflex. crossed j. SYN: crossed reflex. crossed adductor j. SYN: crossed adductor reflex. crossed knee j. SYN: crossed knee reflex. elbow j. SYN: triceps reflex. jaw j. SYN: jaw reflex. knee j. SYN: patellar reflex. supinator j. SYN: brachioradial reflex.
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