The component reflexes of micturition in the cat Part III
The component reflexes of micturition in the cat Part III
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DOI：
10.1093/brain/64.4.239
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发表时间：
1941-01-01
期刊：
影响因子：
14.5
通讯作者：
Barrington, FJF
中科院分区：
文献类型：
--
作者：
Barrington, FJF
在以前的论文（Barrington， 1921年和1931年）中，描述了猫排尿的各种成分反射。第二种是由流经尿道的流水引起的，引起膀胱的强烈收缩，并被骨盆神经或耻骨神经的分裂所消除，但不会被腹下神经的分裂所消除。因此它的传入通路在耻骨神经，传出通路在骨盆。它通过脊髓横断而消失。第二种反射可以很容易地在一只没有头脑的母猫身上得到证明，母猫的下腹神经和膀胱颈部分开，并在后者的每个切口末端都绑了一个套管。所述膀胱插管与一个可升高或降低的梯度温水储存器相连。尿道插管与一根垂直的玻璃管相连，该玻璃管可以充入温水到任何需要的水平：所使用的管子的3cm容量为1cc。在给定的压力下，膀胱的体积是恒定的。尿道管压力每两分钟升高5厘米，直至水从外道口排出，尿道管压力下降；此时膀胱收缩。尿道管内的压力导致水以这种方式从外尿道流出，通常小于30厘米的水，很少超过45厘米。随后，当尿道中的水的压力略高于已经发现的导致水从外道口逸出的压力时，通过突然将尿道与管道连通，总是可以获得强烈的膀胱收缩。在用这种方法做实验时，我们注意到，在某些情况下，在阴部神经被切断后，通过尿道的流水会发生膀胱收缩，在第一部分和第二部分中，Brain, 1931, 5«，177。
IN previous papers (Barrington, 1921'and 1931) various component reflexes of micturition in the cat were described. The second of these was evoked by running water through the urethra, gave rise to a strong contraction of the bladder and was abolished by division of either the pelvic or pudic nerves, but not by division of the hypogastric nerves. Its afferent path was therefore in the pudic nerves and its efferent in the pelvic. It was abolished by transection of the spinal cord. The second reflex can be easily demonstrated in a decerebrate, female cat having th& hypogastric nerves and the bladder neck divided and'a cannula tied into each cut end of the latter. The bladder cannula is connected with a graduated, warm-water reservoir which can be raised or lowered. The urethra cannula is connected with a vertical glass tube which can be filled with warm water to any required level: 3 cm. of the tube used had a capacity of 1 cc The bladder volume, at a given pressure, having become constant, the. pressure in the urethra tube is raised 5 cm. every two minutes until the water escapes from the external meatus and the pressure in the urethra tube falls in consequence; at this moment the bladder contracts. The pressure in the urethra tube which leads to the escape of water from the external meatus in this way is found to be commonly less than 30 cm. of water and only very rarely more than 45 cm. Subsequently a strong bladder contraction can always be obtained by suddenly putting the urethra into communication with the tube when water in it is at a slightly higher pressure than that already found to cause an escape of water from the external meatus. In making experiments in this way it was noticed that in a certain number a contraction of the bladder occurred on running water through the urethra after the pudic nerves had been cut and that in those where i Parts I and II, Brain, 1931, 5 «, 177.