脑卒中患者表面肌电信号与痉挛性肌张力关系分析

Analysis of Correlation between Surface Electromyography and Spasticity after Stroke

为定量评价脑卒中康复患者上肢痉挛性肌张力的大小,提出有效的表面肌电特征指标并研究其与肌张力间的关系,为临床康复评价提供电生理依据。本文选取10名肌张力异常的脑卒中患者,对其进行改良Ashworth评估和肘关节被动正弦曲线运动实验,同时记录肱二头肌和肱三头肌的表面肌电信号,并计算其表面肌电特征指标。结果表明,本文提出的反射肌电阈值可以反映肌张力产生的生理机制并与改良Ashworth量表有显著的相关性,从而达到了定量描述痉挛性肌张力大小的目的,这也说明表面肌电信号用于脑卒中康复患者痉挛性肌张力的量化评价具有临床实用价值。

To quantitatively evaluate the upper-limb spasticity of stroke patients in recovery stage, the relationship between surface electromyography （sEMG） characteristic indexes from biceps brachii and triceps brachii and the spasticity were explored, which provides the electrophysiologicat basis for clinical rehabilitation. Ten patients with spasticity after stroke were selected to be estimated by modified Ashworth （MAS） assessment and a passive elbow si- nusoidal motion experiment was carried out. At the same time, the sEMG of biceps and triceps were recorded. The results shows that the reflex electromyographic threshold could reflect the physiological mechanism of spasticity and had significant correlation with MAS scale which showed that sEMG could be prosperous for the clinical quantitative evaluation of spasticity of stroke patients.