马蹄神经元参与心肾调节及其与鉴定的内脏细胞的联系。

K S Rózsa, D B Logunov
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引用次数: 0

摘要

研究了海参中枢神经系统中足神经节细胞参与心脏活动的调节及其与内脏神经元的联系。结果发现:(1)足神经节中有大量细胞接受来自心脏的输入。踏板细胞对心脏传入信号的反应具有特征性:先是放电频率高,然后是抑制,然后是活动的二次强直性增加。一些踏板细胞在短暂的延迟后被激活;(2)在心脏触觉刺激时,内脏神经节和右侧顶叶神经节的许多细胞与踏板神经元同时被激活。在不同的神经节中,可以观察到对心脏传入信号的响应方向相同或相反,但其持续时间在每个细胞中是相同的;(3)左足神经节(LP3)的一个细胞与内脏神经节的几个细胞形成单突触连接。内脏细胞的轴突,单突触连接到神经元LP3,进入肠神经。LP3对内脏细胞产生EPSPs;(4)心脏兴奋性运动神经元V41与若干踏板细胞同时接受来自心脏的兴奋性输入。心脏兴奋性运动神经元参与心脏调节网络的传入和传出通路;(5)发现一个运动神经元(V43)引起心脏松弛,分支进入肠神经,类似于其他由心脏传入神经激活的运动神经元。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Involvement of pedal neurons in cardio-renal regulation and their connections with identified visceral cells in Helix pomatia L.

Involvement of the cells of pedal ganglia in the regulation of heart activity and their connections with visceral neurons was studied in the central nervous system of Helix pomatia L. It was found that (1) numerous cells of pedal ganglia receive inputs from the heart. The reaction of the pedal cells to heart afferents was characteristic: initial high frequency increase of firing followed by inhibition, then a secondary tonic increase occurred in activity. Some of the pedal cells were activated after a brief delay; (2) many of the cells of the visceral and right parietal ganglia were activated simultaneously with pedal neurons during tactile stimulation of the heart. In different ganglia the answer to heart afferents can be observed to the same or opposite directions but its duration was identical in every cell; (3) one cell of the left pedal ganglion (LP3) formed monosynaptic connections with several cells of the visceral ganglion. The axons of the visceral cells, connected monosynaptically to the neurons LP3, runs into the intestinal nerve. LP3 caused EPSPs on the visceral cells; (4) the heart excitatory motoneuron V41, simultaneously with a number of pedal cells, receives excitatory inputs from the heart. The heart excitatory motoneuron is involved in the afferent and efferent pathways of heart regulatory network; (5) a motoneuron (V43) was identified to cause relaxation of the heart, giving branches into the intestinal nerve and similarly to other motoneurons activated by heart afferents.

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