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本文用成年猫8只,向直肠壁浆膜下层和肌层内多点注入10％HRP溶液200微升,研究结果证明①猫直肠初级传入神经来自双侧(?)_1至腰_5和骶_1至尾_1的脊神经节,其高峰节段是腰_2和骶_2节段。②脊神经节内直肠的初级传入神经元胞体多为圆形和椭圆形,少数是梭形和不规则形。③直肠初级传入神经元的中枢突经李氏束深面进入骶髓_(13)节段,围绕后角形成较大的外侧束和较小的内侧束。两束沿后角外侧阳内侧缘行向腹侧,其终末均终止于灰质Ⅱ,Ⅲ层和Ⅴ、Ⅶ层.④直肠副交感节前神经元位于双侧骶_1至尾_1节段的中间带外侧核,并在网状核、侧素、后外侧核、中界核和前角后外侧核也见到标记细胞。
In this paper, 8 adult cats were injected into the rectal wall submucosa and myometrial multi-point 10% HRP solution 200 microliters, the results show that ① cat primary rectal afferent nerve from bilateral (?) _1 to lumbar _5 and The sacral _1 to the tail _1 spinal ganglia, the peak segments are lumbar _2 and sacral _2 segments. ② The primary afferent neurons in the rectum of the spinal ganglia are mostly round and oval, and a few are fusiform and irregular. ③ rectal primary afferent neurons into the deep sac of the central nervous system into the sacral spinal cord section (13), around the posterior horn to form a larger lateral bundle and a smaller medial bundle. The two posterior horn along the medial lateral edge of the ventral line to the ventral, and its terminal ends in the gray Ⅱ, Ⅲ and Ⅴ, Ⅶ layer .④ rectal parasympathetic preganglionic neurons located in the bilateral sacral _1 to the tail _1 segment Of the medial zone of lateral nucleus, and in the reticular nucleus, flanking, posterior lateral nucleus, the middle boundary nucleus and anterior horn posterior lateral nucleus also see labeled cells.