顎・舌運動制御にかかわる咀嚼筋および舌筋固有受容感覚ニューロンの中枢分布
第II報. 舌筋固有受容感覚ニューロンの―分布
1987 年 54 巻 2 号 p. 387-403
詳細
1987 年 54 巻 2 号 p. 387-403
The central projection of lingual proprioceptive afferents was investigated by the horseradish peroxidase (HRP) -labeling technique. Five Japanese monkeys were used in this study.
The neuron somata were labeled in the upper three cervical spinal ganglia, C2, C3 and C4, being particularly striking in the C2 and C3 and scantily in the C1 .
The central projection of the HRP-labeled cells was found to take three different courses from these ganglia.
Firstly, the labeled fibers enter into the dorsolateral fasciculus, through which they ascend the trigeminal spinal tract, branching off to the lamina I in the dorsal horn (C1-C3), and then ascend through the ventral and dorsal portion of the tract, finally terminating in the reticular formation area lateral to the hypoglossal nucleus at the level of the lemniscal decussation.
Secondly, the labeled fibers enter into the dorsal horn through the dorsal root, terminating in the lamina V and the spinal reticular formation of the C1-C3 spinal cord segments.
Thirdly, the labeled fibers enter into the cuneate fasciculus of the dorsal funiculus, through which they ascend and terminate in the cuneate nucleus of the medulla.
