Yokoyama S, Ozaki T, Kajitsuka T
Am J Physiol. 1977 Feb;232(2):E109-13. doi: 10.1152/ajpendo.1977.232.2.E109.
Excitation conduction in Meissner's plexus of the rabit small intestine was investigated by analyzing the records of potentials evoked by a single electrical stimulus applied to this plexus. Experiments were performed on the Meissner's plexus that remained attached to the circular muscle after the longitudinal muscle and mucous membrane were removed from intestinal segment. Conduction velocities of nerve impulses were 0.3-0.7 m/s, chronaxie of the nerve bundle was 0.06-0.12 ms. While the distance between the stimulating and recording electrodes was increased, the latency of evoked potentials was prolonged, the number increased, and the amplitude decreased; no potentials could be recorded when the distance was more than 4 mm. Evoked potentials recorded at relatively long conduction distance were reduced in amplitude or abolished after a repeated stimulation with high frequencies above 50/s, after hexamethonium application, and in a state of lack of oxygen. It was concluded that, in Meissner's plexus, nerve impulses spread through multiple pathways and make synaptic transmission at a relatively short conduction distance.
通过分析施加于兔小肠迈斯纳神经丛的单个电刺激所诱发的电位记录，对该神经丛的兴奋传导进行了研究。实验是在从肠段去除纵行肌和黏膜后仍附着于环形肌的迈斯纳神经丛上进行的。神经冲动的传导速度为0.3 - 0.7米/秒，神经束的时值为0.06 - 0.12毫秒。当刺激电极与记录电极之间的距离增加时，诱发电位的潜伏期延长，数量增加，幅度减小；当距离超过4毫米时，无法记录到电位。在相对较长的传导距离处记录的诱发电位，在高于50/秒的高频重复刺激后、应用六甲铵后以及缺氧状态下，幅度降低或消失。得出的结论是，在迈斯纳神经丛中，神经冲动通过多条途径传播，并在相对较短的传导距离处进行突触传递。
