梭内肌传入纤维的梭内肌运动神经元活动的敏感性增强后效的时程特征。

Temporal characteristics of the sensitivity-enhancing after-effects of fusimotor activity on spindle Ia afferents.

机构信息

Brain Research Institute, University of Zürich, Switzerland.

出版信息

Brain Res. 1983 Jan 3;258(1):139-43. doi: 10.1016/0006-8993(83)91239-8.

Abstract

The after-effects of fusimotor stimulation which enhance dynamic sensitivity of spindle Ia afferents have been further investigated. The response to small sinusoidal movements was increased during muscle lengthening, following stimulation of single static or dynamic gamma-axons at resting length. This effect could be elicited by low rate stimulation during less than one second, and it persisted for up to two minutes. It might therefore be relevant for the control of spindle sensitivity during postural tasks.

摘要

我们进一步研究了肌梭传入纤维动态敏感性增强的梭内肌传入纤维的后效。在静息长度下刺激单个静态或动态γ轴突后，肌肉牵伸时Ia 传入纤维对小正弦运动的反应增强。这种效应可在不到 1 秒的低频率刺激下引发，并持续长达 2 分钟。因此，它可能与姿势任务中对梭内敏感性的控制有关。