fasciculus, gen. and pi. fasciculi

(fS-sik'u-lus) [L. dim. of fascis, bundle.] Fascicle; a small band or bundle of fibers, usually of muscle or nerve-fibers. or bundle, atrioventricular bundle.* ciculus, anterior ground or basis bundle, Flechsig's fasciculus; a subdivision of the anterior funiculus or 3S3 white column of the spinal cord, containing fibers from the cells of the cord itself. f. anterolatera'lis superficia'lis [BNA], superficial anterolateral fasciculus, Gowers' tract; a tract of ascending fibers on the lateral surface of the spinal cord anterior to the cerebellospinal fasciculus. f, arcua'tus, f. longitudinal is superior. f. cere bel los pin a'lis [BNAl, cerebellospinal fasciculus direct cerebellar tract of Flechsig; a band-like tract of ascending white fibers on the posterolateral surface of the spinal cord immediately in front of the line of entrance of the posterior nerve-roots. f, cerebrospinal lis ante'rior [BNA], anterior cerebrospinal or pyramidal fasciculus, Tuerck's column, direct pyramidal tract, a subdivision of the anterior funiculus, or white column, of the spinal cord. f. cere bros pin a'Us later a'lis [BNA], lateral cerebrospinal or pyramidal fasciculus, cro ed pyramidal tract; a tract of descending fibers in the spinal cord just anterior to the cerebellospinal fasciculus and to the outer side of the posterior column or horn of gray matter. 10 5 4:o Section op the Spinal Cord in the Cervical Region (Schematic): i. Fasciculus cuneatus, Burdach's column; 2, fasciculus cerebrospinal is lateral is, cro ed pyramidal tract; 3, fasciculus lateral is proprius, lateral ground bundle; 4, fasciculus anterior proprius, Flechsig's fasciculus, anterior ground bundle; fasciculus cerebrospinal is ventral is, direct pyramS, idal tract, Tuerck's fasciculus; 6, fasciculus in termed i us; 7, fasciculus anterolateralis superficiahs, Gowers' tract; 8, fasciculus cere bel los pin a lis, Flechsig's direct cerebellar tract; 9. fasciculus marginal is, Spitzka's, or Li auer's, marginal tract; 10, fasciculus gracilis, GoU's tract or column. {Landouzy andjayle). f, cunea'tus [BNA], wedge-shaped fasciculus, column or tract of Burdach, the outer tract of the posterior funiculus, or white column, of the spinal cord, containing many fibers from the posterior nerve roots. f. ex'ilis^ a small bundle of muscle-fibers arising from the medial epicondyle of the humerus or the coronoid proce of the ulnar, and joining the flexor long us poUicis muscle. f. grac'ilis [BNA], slender fasciculus, column or tract of Goll; the inner division of the posterior funiculus, or white column, of the spinal cord, containing ascending sensory fibers. inter me'dius, the rubrospinal, cerebellospinal, f. lateral vestibulospinal, and oUvospinal tracts collectively. f. later a'lis pro'prius [BNA], proper lateral fasciculus, Flechsig's lateral fasciculus, lateral ground or basis bundle; a tract constituting the inner portion of the lateral funiculus or white column of the spinal cord, containing a ociation fibers from cells of the cord itself. f. longitudinal is infe'rior, inferior longitudinal f., a well marked bundle of long a ociation fibers running the whole length of the occipital and temporal lobes of the cerebrum, in part parallel with the inferior horn of the lateral ventricle. ' longitudina'Us media'lis [BNA], medial longitudif. nal fasciculus, posterior longitudinal bundle, a longitudinal bundle of fibers running from the mesencephalon to the spinal cord through the tegmentum of the cerebral peduncle, between the central gray stratum and the red nucleus, just beneath the floor of the fourth ventricle. longitudina'Us supe'rior, superior longitudinal f. a bundle of long a ociation fibers in the lateral f.,