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[电敏感神经元膜对低频正弦刺激的选择性敏感性的特异性]

[Specificity of the selective sensitivity of electrosensitive neuron membranes to low-frequency sinusoidal stimulation].

作者信息

D'iakonova T L, Mikhal'tsev I E

出版信息

Fiziol Zh SSSR Im I M Sechenova. 1983 Mar;69(3):335-42.

PMID:6852289
Abstract

A difference in sensitivity of mollusk's neuron to intracellular injection of sinusoidal current (1-10 Hz; 5.10(-10)--5.10(-9) A) was found as well as the complete cessation of activity at certain frequency--amplitude characteristics of the current ("windows" of blocked activity) and an increasing activity at other frequency--amplitude parameters of the current ("windows" of growing activity). This may be due to some properties of the neuron's electrosensitive membrane: the specifics of the voltage--current characteristics, membrane capacity as well as the property known as "force--duration" relationship. The key importance lies in the dependence of the hyperpolarization of the neuron upon the amplitude and the frequency of the sinusoidal irritant.

摘要

发现软体动物神经元对细胞内注入正弦电流(1 - 10赫兹;5×10⁻¹⁰ - 5×10⁻⁹安培)的敏感性存在差异,以及在特定频率 - 电流幅度特征下活动完全停止(“活动阻断窗口”),而在其他频率 - 电流幅度参数下活动增加(“活动增强窗口”)。这可能归因于神经元电敏感膜的某些特性:电压 - 电流特性的细节、膜电容以及被称为“力 - 持续时间”关系的特性。关键在于神经元超极化对正弦刺激的幅度和频率的依赖性。

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