| 释义 |
DictionarySeetractventral spinocerebellar tract
an·te·ri·or spi·no·cer·e·bel·lar tract [TA] a bundle of fibers originating in the base of the posterior horn and zona intermedia throughout lumbosacral segments of the spinal cord, crossing to the opposite side and ascending in a peripheral position in the ventral half of the lateral funiculus. In its ascent through the rhombencephalon, the tract curves sharply dorsalward along the rostral border of the trigeminal motor nucleus, entering the cerebellum in a caudal direction over the surface of the superior cerebellar peduncle, and terminating as mossy fibers in the granular layer of the cortex of the cerebellar vermis. The bundle conveys proprioceptive and exteroceptive information largely from the opposite lower extremity, although some of its fibers recross in the cerebellum. Synonym(s): tractus spinocerebellaris anterior [TA], ventral spinocerebellar tract ☆ , Gowers column, Gowers tractventral spinocerebellar tractAn axon tract originating in the contralateral dorsal and intermediate horns of the lower spinal cord, from the coccygeal through the lumbar segments. This tract runs in the lateral funiculus of the spinal cord, recrosses the midline, and terminates in the ipsilateral vermis of the cerebellum. Synonym: anterior spinocerebellar tractSee also: tract |