采用含不同浓度茶水的任氏液在不同时间段内浸泡蟾蜍坐骨神经干的方法,研究了茶水对蟾蜍坐骨神经干动作电位的宽度、幅度、引起动作电位的阈强度、不应期及传导速度等电生理指标的影响。结果表明,低浓度茶水处理后,动作电位的宽度变小、幅度变大、引起动作电位的阈强度降低、不应期缩短、传导速度变快,随着茶水浓度的升高和浸泡时间的延长,以上结果均成反向趋势。可以得出如下结论：低浓度茶水使神经的兴奋性升高,传导速度加快;高浓度茶水或浸泡时间过长,可降低神经的兴奋性,减慢传导速度。

In order to probe the influence of the different concentration of tea solution on the electrophysiological character of toad’s sciatic nerves, the toad’s sciatic nerves were immersed in different groups of solution respectively: normal Ringer’s solution and different concentration of tea solution. After the different intervals of immersion time, the width, the amplitude, threshold intensity, refractory period, conduction velocity of the action potentials of the sciatic nerves from each group were measured respectively. The results showed that the lower concentrations of tea solution increased the amplitude and the conduction velocity of the action potential; but the width, threshold intensity and the refractory period of the action potential of the sciatic nerves were decreased. The case was reversed when the solution concentration was raised and the interval was prolonged. This can be concluded that the excitability of nerves could be increased by the lower concentration of tea solution, but it could be decreased as the solution concentration was raised and the interval was prolonged.