Tang Lu, Li Fei, Cao Shuai, Zhang Xu, Chen Xiang
Annu Int Conf IEEE Eng Med Biol Soc. 2014;2014:3590-3. doi: 10.1109/EMBC.2014.6944399.
Muscle synergy is considered as a vector specifying a pattern of relative muscle activation. The goal of this paper is to explore whether there exists similarities between muscle synergies in similar upper limb motion tasks. One center-out-center reaching task and two path movement tasks with regard to the elbow and shoulder joints were designed, and seven healthy adults were recruited in this study. Surface electromyographic (sEMG) signals were recorded from 10 upper arm and shoulder muscles, and muscle synergies were extracted using nonnegative matrix factorization algorithm. Although there existed individual differences among subjects, experimental results showed that the structures of muscle synergies extracted from these three similar tasks were similar on the ground of the values of Pearson's correlation coefficient was greater than 0.85. Through this finding, the neuromuscular control strategies of upper limb in similar tasks could be explained clearly, which also provided significant evidence to support the hypothesis of muscle synergies.
肌肉协同作用被视为一种指定相对肌肉激活模式的向量。本文的目的是探讨在相似的上肢运动任务中肌肉协同作用之间是否存在相似性。设计了一个中心向外再回到中心的伸展任务以及两个关于肘关节和肩关节的路径运动任务，并招募了7名健康成年人参与本研究。从10块上臂和肩部肌肉记录表面肌电图（sEMG）信号，并使用非负矩阵分解算法提取肌肉协同作用。尽管受试者之间存在个体差异，但实验结果表明，基于皮尔逊相关系数值大于0.85，从这三个相似任务中提取的肌肉协同作用结构是相似的。通过这一发现，可以清楚地解释相似任务中上肢的神经肌肉控制策略，这也为支持肌肉协同作用假说提供了重要证据。
