人体中对侧运动对交互抑制的增强作用。

Reinforcement of reciprocal inhibition by contralateral movements in man.

作者信息

Delwaide P J, Sabatino M, Pepin J L, La Grutta V

机构信息

Section of Neurology and Clinical Neurophysiology, University of Liege, Belgium.

出版信息

Exp Neurol. 1988 Jan;99(1):10-6. doi: 10.1016/0014-4886(88)90122-7.

DOI:10.1016/0014-4886(88)90122-7

PMID:3335235

Abstract

A reduction of flexor carpi radialis H reflex size was produced by submotor threshold stimulation of the radial nerve. This reduction reflects reciprocal inhibition exerted by the inhibitory IA interneuron. The effects of contralateral movements on IA reciprocal inhibition were studied in eight normal subjects. Active contralateral arm movement appeared to significantly increase the degree of reciprocal inhibition without affecting the unconditioned reflex. A minor enhancement of reciprocal inhibition was also noted after passive mobilization. Results are discussed in terms of contralateral segmental afferent fibers influencing IA interneuronal excitability. They strongly suggest that contralateral muscular IA afferents may reinforce reciprocal inhibition in man.

摘要

对桡神经进行亚运动阈值刺激可使桡侧腕屈肌H反射的大小减小。这种减小反映了抑制性Ia中间神经元施加的交互抑制。在8名正常受试者中研究了对侧运动对Ia交互抑制的影响。对侧手臂主动运动似乎显著增加了交互抑制的程度，而不影响非条件反射。被动活动后也注意到交互抑制有轻微增强。根据影响Ia中间神经元兴奋性的对侧节段传入纤维对结果进行了讨论。结果强烈表明，对侧肌肉的Ia传入纤维可能会加强人体的交互抑制。