静态负荷诱发肌肉疲劳时表面肌电信号(sEMG)变化与主观疲劳感之间的关系  

Relationship between Surface Electromyographic Signal(sEMG) Changes and Subjective Assessment of Muscle Fatigue during Isometric Contractions.

作　　者：王笃明[1] 王健[1] 葛列众[2] 

机构地区：[1]浙江大学心理学系,浙江杭州310028 [2]浙江理工大学心理学研究所,浙江杭州310033

出　　处：《航天医学与医学工程》2004年第3期201-204,共4页Space Medicine & Medical Engineering

基　　金：国家自然科学基金 ( 3 0 170 44 7)

摘　　要：目的探讨静态负荷诱发肌肉疲劳时肌电信号指标与主观疲劳感之间的数量关系。方法记录 1 1名被试持续负重时主观疲劳感量表得分及肱二头肌相应表面肌电信号 ,分析MPF、MF和Lempel ziv复杂度以及持续时间与主观疲劳感量表分数之间的相关 ,并对其间的数量关系进行拟合。结果主观疲劳评定分数与持续时间成显著正相关 ,而与各肌电信号指标成不同程度的显著负相关。以主观疲劳评定分数为因变量 ,以持续时间及各肌电信号指标为自变量的对数函数和幂函数的拟合均具有统计学意义。结论主观疲劳感得分与表面肌电信号指标及持续时间对反映肌肉疲劳状态具有较高一致性 ;其间的数量关系比较符合心理物理学中Stevens幂定律。Objective To investigate the numerical relationship between the changes of surface electromyographic(sEMG) signal indexes and subjective assessment of muscle fatigue during isometric contractions. Method Eleven healthy subjects participated in the experiment.The sEMG signals of biceps were recorded during their sustained isometric contractions at 50% maximum voluntary contraction (MVC).Fatigue was subjectively rated using a Borg CR-10 scale. Correlations between Borg ratings and a series of fatigue-related indexes such as MPF,MF and Lempel-ziv complexity were analyzed, and curve estimation was also explored. Result A strong positive correlation was found between Borg ratings and endurance time, and negative correlations at different degrees were found between Borg ratings and each of sEMG signal indexes. Curve estimation (Logarithmic curve and Power curve) was also significant. Conclusion The significant correlation between the Borg scale, sEMG signal indexes and endurance time indicates a close relationship between subjective and objective assessment of muscle fatigue. The numerical relationship between them accord with the power law of Stevens in psychophysics relatively.

关 键 词：表面肌电信号 肌肉疲劳 主观评定 心理物理学 

分 类 号：TB18[一般工业技术] R857.1[医药卫生—航空、航天与航海医学]