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crus

crus , gen. cruris , pl. crura (krus, kru´ris, -ra) [NA]

1. leg 2. Any anatomical structure resembling a leg; usually (in the plural) a pair of diverging bands or elongated masses. See also limb. [L.]
ampullary crura of semicircular ducts the dilated ends of the three semicircular ducts, each of which contains a specialized thickening of the epithelium known as the ampullary crest.crura membranacea ampullaria ductus semicircularis [NA] , ampullary limbs of semicircular ducts;
anterior c. of stapes the anterior of the two delicate curving limbs of the stapes that pass from the head of the bone to the base or footplate.c. anterius stapedis [NA] , anterior limb of stapes;
c. ante´rius cap´sulae inter´nae [NA] anterior limb of internal capsule
c. ante´rius stape´dis [NA] anterior c. of stapes
c. anthel´icis [NA] c. of antihelix
c. of antihelix one of two ridges, inferior and superior, bounding the fossa triangularis, by which the antihelix begins at the upper part of the auricle.c. anthelicis [NA] , leg of antihelix;
crura of bony semicircular canals the extremities of the bony semicircular canals in which the corresponding membranous limbs of the semicircular ducts are located; they are the common bony c., simple bony c., and ampullary bony c.crura ossea canalium semicircularium [NA] , limbs of bony semicircular canals;
c. bre´ve incu´dis [NA] short c. of incus
c. cer´ebri [NA] specifically, the massive bundle of corticofugal nerve fibers passing longitudinally on the ventral surface of the midbrain on each side of the midline; it consists of fibers descending from the cortex to the tegmentum of the brainstem, pontine gray matter, and spinal cord. See also cerebral peduncle, basis pedunculi.
c. clitor´idis [NA] c. of clitoris
c. of clitoris the continuation on each side of the corpus cavernosum of the clitoris which diverges from the body posteriorly and is attached to the pubic arch.c. clitoridis [NA];
common c. of semicircular ducts the united, nonampullary ends of the superior and posterior semicircular ducts.c. membranaceum commune ductus semicircularis [NA] , common limb of membranous semicircular ducts;
c. cor´poris caverno´si pe´nis c. of penis
c. dex´trum diaphrag´matis [NA] right c. of diaphragm
c. dex´trum fasci´culi atrioventricula´ris [NA] right c. of atrioventricular bundle See also atrioventricular bundle.
c. for´nicis [NA] that part of the fornix that rises in a forward curve behind the thalamus to continue forward as the body for fornix ventral to the corpus callosum.c. of fornix, posterior pillar of fornix;
c. of fornix c. fornicis
c. hel´icis [NA] c. of helix
c. of helix a transverse ridge continuing backward from the helix of the auricle, dividing the concha into an upper portion (cymba) and a lower portion (cavity of concha).c. helicis [NA] , crista helicis, limb of helix;
lateral c. limb or leg-like portion of a structure, farthest from midline.c. laterale [NA] , lateral limb;
c. latera´le [NA] lateral c
c. latera´le an´uli inguina´lis superficia´lis lateral c. of the superficial inguinal ring
c. latera´le cartila´ginis ala´ris major´is lateral c. of the greater alar cartilage of the nose
lateral c. of facial canal laterally-placed, posteriorly-directed second portion of the horizontal part of the facial canal. See horizontal part of facial canal.lateral c. of horizontal part of the facial canal;
lateral c. of the greater alar cartilage of the nose portion of cartilage extending laterally and posteriorly in a wing-like fashion, supporting the wing of the nose and keeping the nostril patent.c. laterale cartilaginis alaris majoris;
lateral c. of horizontal part of the facial canal lateral c. of facial canal See horizontal part of facial canal.
lateral c. of the superficial inguinal ring portion of the external oblique aponeurosis which passes lateral to the superficial inguinal ring blending into the inguinal ligament and forming the lateral boundary of the ring.c. laterale anuli inguinalis superficialis;
left c. of atrioventricular bundle the left leg or branch of the atrioventricular bundle which separates from the atrioventricular bundle just below the membranous portion of the interventricular septum to descend the septal wall of the left ventricle and begins to ramify subendocardially.c. sinistrum fasciculi atrioventricularis [NA];
left c. of diaphragm the muscular origin of the diaphragm from the upper two or three lumbar vertebrae that ascends to the left of the aorta to reach the central tendon.c. sinistrum diaphragmatis [NA];
long c. of incus the process of the incus that articulates with the stapes.c. longum incudis [NA];
c. lon´gum incu´dis [NA] long c. of incus
medial c. limb or leg-like portion of a structure closest to the midline.c. mediale [NA] , medial limb;
c. media´le [NA] medial c
c. media´le ann´uli inguina´lis superficia´lis medial c. of the superficial inguinal ring
c. media´le cartila´ginis ala´ris major´is medial c. of greater alar cartilage of nose
medial c. of facial canal medially-placed, anteriorly-directed first portion of the horizontal part of the facial canal. See horizontal part of facial canal.medial c. of the horizontal part of the facial canal;
medial c. of greater alar cartilage of nose portion of cartilage that forms the anterioinferior portion of the cartilaginous septum between nostrils.c. mediale cartilaginis alaris majoris;
medial c. of the horizontal part of the facial canal medial c. of facial canal See horizontal part of facial canal.
medial c. of the superficial inguinal ring portion of the external oblique aponeurosis which passes medial to the superficial inguinal ring forming the medial boundary of the ring.c. mediale annuli inguinalis superficialis;
cru´ra membrana´cea ampulla´ria duc´tus semicircula´ris [NA] ampullary crura of semicircular ducts
c. membrana´ceum commu´ne duc´tus semicircula´ris [NA] common c. of semicircular ducts
c. membrana´ceum sim´plex duc´tus semicircula´ris [NA] simple c. of semicircular duct
cru´ra os´sea cana´lium semicircula´rium [NA] crura of bony semicircular canals
c. pe´nis [NA] c. of penis
c. of penis the posterior, tapering portion of the corpus cavernosum penis which diverges from its contralateral partner to be attached to the ischiopubic ramus.c. penis [NA] , c. corporis cavernosi penis;
posterior c. of stapes the posterior of the two delicate limbs of the stapes that connect the head and base or footplate of the bone.c. posterius stapedis [NA] , posterior limb of stapes;
c. poste´rius cap´sulae inter´nae [NA] posterior limb of internal capsule
c. poste´rius stape´dis [NA] posterior c. of stapes
right c. of atrioventricular bundle the right leg or branch of the atrioventricular bundle which diverges from the left c. just below the membranous portion of the interventricular septum to descend the septal wall of the right ventricle and ramify beneath the endocardium.c. dextrum fasciculi atrioventricularis [NA];
right c. of diaphragm the muscular origin of the diaphragm from the bodies of the upper three or four lumbar vertebrae that passes upward to the right of the aorta toward the central tendon; the esophageal hiatus is a parting of the fibers of the right c. to allow passage of the esophagus.c. dextrum diaphragmatis [NA];
short c. of incus the short c. of incus; the process of the incus that fits into a depression (fossa incudis) in the epitympanic recess.c. breve incudis [NA];
simple c. of semicircular duct the non-ampullary end of the lateral semicircular duct that opens independently into the utricle.c. membranaceum simplex ductus semicircularis [NA] , simple membranous limb of semicircular duct;
c. sinis´trum diaphrag´matis [NA] left c. of diaphragm
c. sinis´trum fasci´culi atrioventricula´ris [NA] left c. of atrioventricular bundle See also atrioventricular bundle.

 

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