大鼠股神经和膀胱顶部感觉神经在脊髓胶状质的定位投射——酸性磷酸酶法

将大鼠30只分三组,分别切断右侧三支脊神经背根(T_13,L_1,2)、右侧股神经和膀胱顶部。用ACP法追踪三者在脊髓胶状质内的定位投射。发现切断三支脊神经背根后,中间节段胶状质ACP活性全部消失,首尾节段外侧消失。股神经投射至L_(1～3)节段同侧胶状质内侧1/2部。膀胱顶部主要分散地投射在L(1-3)节段胶状质内侧2/3的范围。

The Projection of Femoral Nerve and Nerves in the Vertex of Urinary Bladder to the Rolando Gelatinous Substance: An Acid Phosphatase Method

Investigations were performed on 30 rats. It was divided into 3 groups:(1)tran-section of spinal dorsal roots(T-13,L01,3) of right side, (2) transection of femoral nerve right side and(3) excision of the vertex of urinary bladder. The projections of fiber to the ipsilateral Rolando substance (RS) were localizd by the method for demonstration of acid phosphatase(ACP). It was found that: All the ACP activity in substantia gelatinosa of the middle segment (L1) was lost after transection of dorsal roots, whereas at the upper and lower adjacent segments (T13.L2),the ACP was absent in the lateral part of RS. The observations revealed that the afferent fibers of femoral nerve were projected to the medial half of ipsilateral RS. Hewever the projection from the bladder vertex was quite diffused. The fibers from bladder dispersed mainly to the medial 2/3 of RS at the level L1-L3.