表面肌电信号与肢体运动直接相关，肢体的不同动作具有不同的肌肉收缩模式，这些模式的差别反映在表面肌电信号特征的差异上-Surface EMG and limb movements directly related to the different movements of the limbs have different muscle contraction mode, the difference between these patterns reflect differences in sEM