fasciculus

(fas-ik’u-lus) [L. dim. of fes’cis bundle}. A small bundle or cluster, chiefly of nervous or muscular fibers. f. acus’tic us, one of a series of white striw extending transversely acro the floor of the fourth ventricle of the brain. f. ante’rior pro‘prius, the anterior ground-bundle. See bundle. ἔ. anterolatera‘lis superficia’lis, Gowers’ tract. f. arcua’tus, the superior longitudinal fasciculus. Arnold’s f., the frontal tract of the crusta. f. atrioventricula’ris, auriculoventricular f. Same as bundle of His. f. cere bel los pin a’lis. Same as direct cerebellar tract. under tract. cuneate f., a continuation of the oblong at a into the posterior columns of the spinal cord. f. ex’ilis, a cluster of muscle-fibers connecting the flexor pollicis long us with the inner condyle of the humerus, or with the coronoid proce of the ulna. Flechsig’s f., the anterior ground-bundle and the lateral ground-bundle. See under bundle. Foville’s oblique f., the peduncle of the cerebellum. fundamental! f.,a rt of the ventral column of the myelon extending into the oblong at a. f. gra/cilis, a continuation of the dor so median column of the myelon into the oblong at a. f. in nomina’tus, cither of two bundles of nerve-fibers within the medulla oblong at a, continuous with the fasciculus teres. f. later a’lis pro’prius, the lateral ground bundle. See bundle. longitudinal f., posterior, a bundle of nerve-fibers in the pons and crus joining the corpora quadrigemina and the nuclei of the fourth and sixth nerves with the structures below. f. longitudina’lis media‘lis. Same as longitudinal f., posterior. maculary f., a cla or system of nerve-fibers which originate in the macula lutea. Some are uncro ed (on the temporal side) and others are cro ed fibers (on the nasal side of the retina). Meynert’s f., the ° fasciculus retroflex us: a small white fascicle of nerve-fibers going from the habenula to the inter peduncular space. f. occipitofronta’lis (of Déjérine), a bundle of fibers in the brain extending along the external angle cf the lateral ventricle, within the corona radiata, above the caudate nucleus, and beneath and_ external to the corpus callosum, and between the cingulum and the superior longitudinal bundle of Burdach. olivary f., a fillet beneath and inclosing the olivary body. oval f., an area of descending fibers in the posterior funiculus of the spinal cord near the posterior septum; called also median root zone. pyramidal f., direct, a part of the anterior column of the cord extending to the pyramid. Called also f. of Tiirck. f. retrolex’us. See Meynert's f. £. of Rolando, the enlarged head of the posterior cornu of gray matter in the oblong at a. f. rotun’dus. Same as solitary f. solitary f., fibers that connect the internal capsule and the lenticular nucleus with parts below. Called also tractus solitarius, res piratory bundle, and solitary bundie.. subcallo’sus, a tract of long a ociation fibers beneath the callo- sum, runnin to the frontal, occipital, and parietal lobes. T ’s f., fascia dentata. f. te’re the funiculus teres.. omammilia'ris, the bundle of Vicq d'Azyr. tri neural f., a small bundle of nerve-fibers in the upper part of the spinal cord, connecting the glo opharyngeal and vagus nerves. f£. of Tiirck. Same as pyram- ida f. unciform f., uncinate f., a set of fibers connecting the frontal and temporosphenoid