MORPHOLOGICAL AND NEUROPHYSIOLOGICAL STUDY FOR SYMPATHETIC EFFERRENT PATHWAY OF THE CONTROLLING ABDOMINO-PELVIC ORGANS

本研究探讨了人和狗控制射精反应的外周交感神经信号。1）我们的结果表明，存在两种控制盆腔器官的机制;一个是直接神经支配系统，具有多条交叉神经支配通路，另一个是由内脏大神经和肾上腺髓质组成的激素系统。控制输精管的是狗的L1-L4，可能是人类的L1-L2，交感神经通路的分化在灵长类动物的盆腔器官的主要通路和代偿通路上进行。3）有两个部位（肠系膜尾丛和前列腺丛），其中来自腰内脏神经的传出信号交叉到另一侧以控制双侧精道。4）在交感神经的分化中，灵长类动物的肠系膜尾丛分为肠系膜下丛和上级腹下丛。这种分裂在狗中没有观察到，在猴子中观察到不完全，在人类中观察到完全，这表明交感神经通路的分化正在进行。

Peripheral sympathetic signals controlling ejaculatory reactions were explored in the dog and man.1) Our results indicate the presence of two kinds of mechanisms controlling the pelvic organs ; one is the direct nerve-innervating system to the seminal tract with multiple cross-innervation pathways and the other the hormonal system consisting of the greater splanchnic nerve and adrenal medulla.2) The spinal cord segments nerve-controlling the vas deferens are L1-L4 in the dog and probably L1-L2 in humans and that differentiation of the sympathetic nerve pathways is proceeding at both main and compensatory pathways to the pelvic organs in the primate.3) There are two sites (caudal mesenteric plexus and prostatic plexus ) where efferent signals from a lumbar splanchnic nerve cross to the other side to control bilateral seminal tracts.4) In the differentiation of the sympathetic nerve, the caudal mesenteric plexus was divided into two plexuses (inferior mesenteric plexus and superior hypogastric plexus) in the primates. This division is not observed in the dog and observed incompletely in monkeys and completely in humans, which suggests a progressing differentiation of the sympathetic pathway.