基于表面肌电信号对比分析的膝下假肢爬梯补偿机制研究  

Study on Compensation Mechanism of Below-Knee Amputee when Climbing Ladder Based on Surface Electromyography Comparison

作　　者：付艳[1] 李世其[1] 陈振国 

机构地区：[1]华中科技大学工业与制造系统工程系,武汉430074 [2]富士康(鸿海)科技集团IE学院,深圳518159

出　　处：《人类工效学》2012年第4期33-37,共5页Chinese Journal of Ergonomics

摘　　要：表面肌电信号是测试肌力大小的重要指标之一。本文通过对6名健体者(健康人组)和6名膝下假肢者(残疾人组)爬梯活动中左右竖脊肌和左右股直肌的表面肌电的时域和频域分析,对比两组被试在爬梯过程中的这四块主要活动肌群肌力的差异。结果,无论是中值频率(MF)还是积分肌电值(iEMG),残疾人被试在假肢一侧的股直肌指标值都要显著小于其健体一侧(P<0.05,n=87),也小于健康被试的股直肌。残疾被试的竖脊肌显著大于健康被试(P<0.001,n=87)。研究表明,爬梯过程中,残疾人假肢一侧的股直肌持久力和爆发力均弱于其他身体部位,腰部及健体一侧提供能力补偿。sEMG is one of the important variables to describe the muscle level. This paper compared the sEMG signals in time and frequency domain from right/left erector spinal and right/left rectus femora of 6 able-bodied people and 6 below-knee amputees and analyzed how differently each muscle of below-knee am- putees and able-bodied people functions during ladder climbing. As the results indicate, both MF and iEMG of the amputees＂ rectus femoris are significantly lower than those of healthy part （P〈0.001,n=87）as well as those of able-bodied people. And MF and iEMG of the below-knee amputees＂ erector spinae are bigger than that of the able-bodied （P〈0.001,n=87）. It can be concluded that the below-knee amputees＂ erector spinals are weaker than other body parts during ladder climbing. The torso and healthy leg provide compensations for the weakness.

关 键 词：积分肌电值(IEMG) 中值频率(MF) 补偿机制 膝下假肢 表面肌电(sEMG) 生物力学 爬梯设计 

分 类 号：TB18[一般工业技术] R741.044[医药卫生—神经病学与精神病学]