家兔阴部神经在脊髓的定位投射

THE SEGMENTAL AND RECIONAL PROJECTIONS OF THE PUDENAL NERVE TO THE SPINAL CORD IN THE RABBIT

本实验用8只家兔切断一侧阴部神经,用HRP涂抹近侧断端,逆行追踪脊髓和脊神经节内的标记细胞。结果:运动神经元分布于骶1——骶4节,集中部位在骶2节。在脊髓横断面上主要位于腹角的腹外侧群,少量细胞见于中央群和腹内侧群,标记的细胞多为中,小型多极细胞。阴部神经的感觉神经元位于骶2-骶3节的脊神经节内。标记细胞有大,中,小三种,小型者较多。细胞在节内的分布无明显的局部定位。所有标记的运动和感觉细胞均见于手术同侧。

This experiment was performed by daubing the powder of HRP on the proximal end of the cutted pudendal nerve on one side to trace the labelled cells in the spinal cord and the spinal ganglion.The result was as follows : 1, The labelled motor cells are mostly of middle and small size and are observed in S1-S4 with a higher concentration in S2.On the transverse section of the spinal cord, they are mainly situated at the ventrolateral group of the ventral horn and a few of them at the central and medial group.The sensory cells of the nerve located in the spinal ganglion of S2 and S3.The labelled cells may be large, middle and small in size. The small ones are more numerous.