Tract

(trait). i. An extended area, usually much longer than it is broad. 2. Any one of the columns of white matter of the spinal cord. See Column . 3. A track or course. T., Alimentary, a musculomembranous canal, about 30 feet in length, extending from the mouth to the anus. Digestion is its chief function, and in this it is aided by certain acce ory organs. T., Anterior Cere bro pontile, a tract of fibers of the eras cerebri extending from the anterior portion of the frontal lobe to the pons. T., Anterior Pyramidal. See T., Pyramidal. T., Antero-lateral Ascending. Synonym of T., Cowers'. T., Bechterew's. See T., Tegmental. T., Bulbar, any of the tracts of fibers found in the bulb or oblong at a. T., Central Medullary, the gray matter of the spinal cord immediately about the central canal. T., Cerebellar. See T., Direct Cerebellar. T., Cerebro-pontile, a tract of fibers pa ing from the cerebrum through the internal capsule and crus to the pons. T., Commi ural, the cerebellar peduncle (Owen). T., Cro ed Thalamotegmental, a tract of fibers pa ing through the tegmentum and connecting the thalamus with the spinal cord (Spitzka). T., Digestive. See 71, Alimentary. T., Direct Cerebellar, an ascending tract of fibers placed at the periphery of the posterior portion of the lateral column of the cord. It pa es upward through the lateral tract of the oblong at a, the restiform body, and the inferior cerebellar peduncle to the vermiform proce of the cerebellum and to the cerebellar lobes. T., Fillet, a tract of fibers pa ing from the fillet along the upper and outer side of the red nucleus through the internal capsule to the parietal lobe. T., First Projection, the corona radiata (Meynert). T. of Flechsig. See T., Principal. T., Frontal Pontile. Synonym of T., Cerebro-pontile. T., Fronto - cerebellar, the tract of fibers connecting the frontal lobe of the brain with the cerebellum. T., Funicular. See Funiculus gracilis. T., Genito-urinary, the genitourinary organs in continuity. T., Goll's. See Golfs. T., Gowers', a tract of fibers from the posterior roots which ran cephalad in the lateral column. One portion of the fibers disappears in the cervical part of the spinal cord, the other terminates in the medulla. T., Habenular, a tract of fibers pa ing from the habenula to the mesal side of the red nucleus at the base of the brain. T., Intellectual. Synonym of T., Fronto-cerebellar. T., Intermediary Lateral.