人类步态期间皮质对腿部肌肉皮肤反射的易化作用。

Cortical facilitation of cutaneous reflexes in leg muscles during human gait.

作者信息

Pijnappels M, Van Wezel B M, Colombo G, Dietz V, Duysens J

机构信息

Department of Medical Physics and Biophysics, University of Nijmegen, Geert Grooteplein 21, 6525 EZ Nijmegen, Netherlands.

出版信息

Brain Res. 1998 Mar 16;787(1):149-53. doi: 10.1016/s0006-8993(97)01557-6.

DOI:10.1016/s0006-8993(97)01557-6

PMID:9518586

Abstract

During human gait, cortical convergence on sural nerve reflex pathways was investigated by means of transcranial magnetic stimulation (TMS) of the cortex in five phases of the step cycle during human walking on a treadmill. Muscular responses to paired electrical and magnetic stimulation were compared with the linear summation of the individual stimuli. For both the tibialis anterior (TA) and biceps femoris (BF) muscles, the averaged data of four subjects showed a significant facilitation mainly in the swing phase of the step cycle. It is suggested that facilitation of corticospinal input onto cutaneous reflex pathways is enhanced specifically in these periods of the step cycle.

摘要

在人类步态研究中，通过对在跑步机上行走的人类步周期的五个阶段进行皮层经颅磁刺激（TMS），研究了皮层对腓肠神经反射通路的汇聚情况。将肌肉对成对电刺激和磁刺激的反应与单个刺激的线性总和进行比较。对于胫骨前肌（TA）和股二头肌（BF），四名受试者的平均数据显示，主要在步周期的摆动期有显著的易化作用。这表明在步周期的这些阶段，皮质脊髓输入对皮肤反射通路的易化作用会特别增强。