采用 HRP 逆行性标记技术,选健康家兔6只,将0.4mg HRP 涂于左侧阴部神经近侧断端内,对躯体传入和传出纤维来源的节段分布进行了观察。结果显示:同侧 S_2～S_4节段脊髓灰质腹角腹外侧部出现了阳性标记细胞,同侧 S_2～S_4脊神经节中也出现了大量的 HRP 标记细胞,仅一只动物的 S_4脊神经节中出现少量 HRP 标记细胞,表明阴部神经躯体传入和传出纤维来源骶髓腹角及相应的脊神经节,并呈现明显的节段性分布。 Using HRP retrograde labeling technique, six healthy rabbits were selected and 0.4 mg HRP was applied to the proximal geniculate part of the left genitals to observe the distribution of the afferent and efferent fiber segments. The results showed that there were positive labeled cells in the ventral part of the ventral horn of S_2 ~ S_4 in the ipsilateral S segment, and a large number of HRP-labeled cells appeared in the ipsilateral S_2 ~ S_4 spinal ganglia. A small amount of HRP labeled cells, indicating that the body of the pudendal nerve afferent fibers and the introduction of the origin of sacral ventral and corresponding spinal ganglia, and showed a significant segmental distribution.