上臂表面肌电信号与肘关节角度的相关性研究

Relationship between Surface EMG and Angle of Elbow Joint

目的根据检测的上臂肱二头肌和肱三头肌表面肌电信号,研究表面肌电信号和肘关节角度之间的相关性。方法在手握恒定目标力量时提取表面肌电信号,并分别从时域采用均方根和积分肌电值方法提取肌电信号的特征值。结果实验结果表明肱二头肌和肱三头肌上的肌电信号幅度的均方根和积分肌电值的变化规律是不同的,前者的肌电信号幅度的均方根和积分肌电值都是随着肘关节角度的增加而增大,而后者的2种值都在肘关节弯曲90°时最大,在45°和135°时的值非常接近。结论肱二头肌和肱三头肌的表面肌电信号,可以反映肘关节角度。

Objective To explore the correlation between the moving angle of elbow joint and surface electromyogram signal（sEMG） activities of biceps and triceps. Methods The eigenvalue of sEMG during elbow joint moving under constant load were calculated with means of root mean square （RMS） and integrated electromyogram （iEMG） in time domain. Results The experimental results showed that both the chavacteristics of RMS and iEMG for biceps differed from those of triceps. The sEMG activities of biceps increased with the increment of elbow joint angle, while those from triceps reached to the maximum values when elbow joint angle was 90°. Furthermore, the sEMG activities of triceps at the elbow angle of 45° was similar with that when elbow angle was 135°. Conclusion The sEMG from biceps and triceps can reflect the moving angle of elbow joint under constant load.