大鼠前庭核群向脊髓的纤维投射—HRP逆行法研究

The Projection from the Vestibular Nuclei to the Spinal Cord in the Rat Using HRP Method

The projection from the vestibular nuclei to the spinal cord was systematically studied in the rat with the method of retrograde transport of HRP. The results were as follows (1)All of four vestibular suhnuclei projected fibers to the spinal cord. The fibers of the lateral, superior and descending vestibular nuclei were distributed in the whold extent of the cord, and the ones of the medial vestibular nucleus in the most of cord except the sacral one. (2)The number of the original cells was different in each nucleus. The cells were the most in the lateral and the fewest in the medial vestibular nuclei. (3)The cells in the lateral together with superior vestibular nuclei commonly projected fibers to the whold spinal cord. (4)A group of cells in the caudal parts of both the medial and descending vestibular nuclei projected the fibers to the lower thoracic cord, not the lumbar one.