SOME PROPERTIES OF FROG SKIN MECHANORECEPTORS
SOME PROPERTIES OF FROG SKIN MECHANORECEPTORS
复制标题
DOI：
10.1113/jphysiol.1958.sp005975
复制
发表时间：
1958-01-01
影响因子：
5.5
通讯作者：
CATTON, WT
中科院分区：
文献类型：
--
作者：
CATTON, WT
通过对蛙皮肤施加尖锐的局部机械或电刺激，单独或联合记录单个感觉单位的放电。通过机械刺激，从皮神经可记录到4种类型的棘波反应，并描述了这些反应的特征和可能的功能联系。电刺激结果表明，感觉冲动在细小的裸露轴突终末的传导比在主要有髓轴突中的传导慢得多。这些端部的传导速度的近似值被确定为0.25米/秒。对电刺激的反应通常比对同一区域的机械刺激反应的频率低得多。这些末端的受体延迟估计在1.5-3毫秒的范围内。结果发现，在潜伏期机械刺激后，末梢的兴奋性在施加这种刺激后1.5-3毫秒时开始增强，但在接下来的3-6毫秒内兴奋性仍高于正常。文中还讨论了这些结果和其他结果的意义。
Single sensory unit discharges were recorded by applying to frog skin sharply localized mechanical or electrical stimuli, separately or in combination. By mechanical stimulation, 4 types of spike responses could be recorded from the cutaneous nerve and the characteristics and probable functional correlations of these responses are described. Results of electrical stimulation indicate that conduction of the sensory impulse in the fine naked axon terminations was much slower than in the main myelinated axon. An approximate value for conduction velocity in these endings was determined to be 0.25 m/sec. The responses to electrical stimulation generally fatigued at much lower frequencies than did those to mechanical stimulation of the same area. Receptor delay for these endings was estimated in the range of 1.5-3 msec. It was found that following a subliminal mechanical stimulus, the excitability of the endings begins to be enhanced at 1.5-3 msec after the application of such a stimulus but the excitability remains above normal for a further period of 3-6 msec. The significance of these and additional results is discussed.