HRP法を用いた網様体脊髄路,前庭脊髄路の研究

DOI

書誌事項

タイトル別名
  • Studies on the reticulospinal tract and the vestibulospinal tract using HRP method

この論文をさがす

抄録

In 1972, Tokita et al reported that the hyperextended posture which appears after bilateral destruction of the labyrinth is due to increased antigravity muscular tonus, and they suggested that contralateral inhibition is greater than ipsilateral excitation in the vestibulospinal system. The author studied the anatomical basis of contralateral control of the vestibulospinal system in the cat.<BR>After the injection of HRP in the cervical, thoracic and lumbar spinal cord, labeled neurons were observed in the pontine and medullary reticular formation and vestibular nuclei.<BR>1) The reticulospinal tract which originates in the nucleus reticularis magnocellularis descended almost entirely ipsilaterally along the whole spinal cord. The number of fibers descending ipsilaterally was 10 to 20 times that descending contralaterally.<BR>2) The reticulospinal tract which originates in the nucleus reticularis gigantocellularis descended bilaterally along the whole spinal cord. The number of fibers descending ipsilaterally was twice that descend-ing contralaterally.<BR>3) The reticulospinal tract which originates in the nucleus reticularis pontis caudalis descended bilaterally along the whole spinal cord. The number of fibers descending ipsilaterally was the same as that descending contralaterally.<BR>4) The vestibulospinal tract which originates in the rostral portion of the descending vestibular nucleus and the medial vestibular nucleus descended bilaterally only to the cervical spinal cord.<BR>5) The vestibulospinal tract which originates in the caudal portion of the descending vestibular nucleus and the medial vestibular nucleus descended bilaterally along the whole spinal cord.<BR>6) The vestibulospinal tract which originates in the lateral vestibular nucleus descended entirely ipsilaterally along the whole spinal cord.<BR>The reticulospinal tract which originates in the nucleus reticularis gigantocellularis is important as a system which relays information from the labyrinth of one side to both ipsi- and contralateral sites along the whole spinal cord.

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ