不同肌肉组选择导出模块对组间肌电反复性的影响（英文）

Choice of Muscles for Extracting Consistent Motor Modules:The Effect of Trial-to-Trial Electromyography Repeatability

目的评价组间肌电反复性对不同肌肉组选择导出模块的影响。方法记录12名参与实验者在自选速度下行走时16块肌肉的肌电图。用组内相关系数评价每个步行周期的肌肉兴奋度和肌肉模块。依据肌肉兴奋度的反复性,区分出3种类型的肌肉组。结果可靠肌肉组显示出较高的组内相关系数(>0.4),而全身肌肉组和混合肌肉组显示出较低的组内相关系数(<0.4)。3种类型肌肉组比较,可靠肌肉组分析得出的模块具有最好的反复性,全身肌肉组和混合肌肉组的反复性较低。结论具有较高可靠性的肌肉兴奋性能够得出较一致的模块。得出一致模块的方法非常重要,尤其是在依靠肌肉兴奋性反馈而改变的运动模式中。

Objective To identify the effect of the repeatability of muscle activations on extraction of consistent motor modules across trials.Methods The activities of sixteen muscles in twelve subjects who consistently walked at a self-selected speed were recorded.The intraclass correlation coefficient(ICC)was used to identify inter-stride repeatability of muscle activities and motor modules.Based on the repeatability of muscle activation,three types of muscle sets were organized.Results The reliable set containing the muscles showed high ICC(>0.4),but the whole-body and mixed sets containing the muscles showed poor ICC(<0.4).When motor modules were extracted from each set,the reliable set showed the highest repeatability of motor module extraction,but the whole-body and mixed sets presented significantly lower repeatability.Conclusions Greater repeatability of muscle activations result ed in consistent motor modules.Extraction of consistent motor modules was a critical issue,especially in real-time motion recognition based on muscle patterns.