清醒猫中轴突切断的展神经核运动神经元的行为活动

Behavioral activities of axotomized abducens nucleus motoneurons in the alert cat.

作者信息

Torres B, Gómez C, Delgado-García J M

出版信息

Brain Res. 1985 Dec 2;348(2):371-4. doi: 10.1016/0006-8993(85)90460-3.

Abstract

The activity of identified control and axotomized abducens motoneurons has been recorded during spontaneous eye movements in the alert cat. Axotomized motoneurons showed a quick fatigability during eye fixations not observed in controls. Discharge rate of axotomized motoneurons during on direction saccades was lower and shorter than in controls and started usually after the beginning of the saccade. Axotomized motoneurons could be antidromically invaded only in the presence of synaptic facilitation. Electrophysiological explanations for the behavior of axotomized motoneurons in the alert cat are discussed in the text.

摘要

在警觉的猫进行自发眼球运动期间，已记录了已识别的对照外展运动神经元和轴突切断的外展运动神经元的活动。轴突切断的运动神经元在眼球注视期间表现出快速疲劳，而对照神经元未观察到这种情况。轴突切断的运动神经元在同向扫视期间的放电率低于对照且持续时间更短，并且通常在扫视开始后才开始。只有在存在突触易化的情况下，轴突切断的运动神经元才能被逆向侵入。文中讨论了警觉猫中轴突切断的运动神经元行为的电生理解释。