Study of the sympathetic pathway controlling penile detumescence

1)盆神经刺激时，观察控制消肿消肿的交感神经通路的识别。刺激腰骶交感干或精索神经并不能引起海绵体压力的明显抑制。(2)切断交感神经通路对消肿效果的影响在双侧胃下神经部分切除后，未观察到勃起等消肿障碍。手动刺激阴茎诱导的勃起在刺激结束后即刻消肿。在同时切断双侧腹下神经和腰骶交感神经干的狗身上也得到了类似的结果。(3)切断双侧腹下神经后，未发现腰骶交感神经干的代偿通路功能。4)大扣神经-肾上腺髓质系统对内脏大神经消肿刺激引起肾上腺髓质分泌氨氯地拉明而引起消肿的作用。5)重建盆神经横断术，即刻吻合，保留其阴茎功能。2.腹下神经的功能和重建1)通过腹下神经支配精液的交感神经通路主要来源于L2和L3腰内脏神经，其起源于L1和L2脊髓节段。2)自主神经的分化在从腰内脏神经到精管的每一条主要和代偿通路上都有进展。3)切断并立即吻合腹下神经可恢复其对精索的功能，并保留其交叉神经机制。

I.Detumescence1) Identification of the sympathetic nerve pathway controlling detumescence Detumescence was observed when the pelvic nerve was stimulated. Stimulation of the lumbosacral sympathetic trunk or the spermatic nerve did not elicit apparent inhibition of cavernous pressure. 2) Effect of transection of the sympathetic nerve pathway to detumescence I n dogs that underwent partial resection of the hypogastric nerve bilaterally, disturbance of detumescence, such as priapism, was not observed. Erection induced by manual penile stimulation showed detumescence immediately after finishing the stimulation. Similar results were obtained in dogs that underwent transection of both the hypogastric nerve and the lumbosacral sympathetic trunk bilaterally. 3) Compensatory pathway Compensatory function of the lumbosacral sympathetic trunk was not found after transecting the hypogastric nerve bilaterally. 4) Effect of major sp1anchnic nerve-adrenal medulla system to detumescence Stimulation of the major splanchnic nerve caused secretion of cathecolamine from adrenal medulla and elicited detumescence. 5) Reconstruction of the pelvic nerve Transection and immediate reattachment of the pelvic nerve preserved its function to the penis. Interposition of the hypogastric nerve between the transected pelvic nerves also preserved its function.II.Function and reconstruction of the hypogastric nerve1) The sympathetic pathway which controls seminal tract via the hypogastric nerve mostly originates from L2 and L3 lumbar splanchnic nerves, which originate from L1 and L2 spinal segments. 2) Differentiation of the autonomic nerve is making progress in each of the main and compensatory pathways from the lumbar splanchnic nerve to the seminal tract. 3) Transection and immediate reattachment of the hypogastric nerve can restore its function to the seminal tract and preserve its cross-innervation mechanism.