基于表面肌电非负矩阵分解与一致性的肌间协同-耦合关系研究

发布时间：2018-08-08 18:08

【摘要】：肌肉协同模型是神经产生并控制运动的低维度结构,探讨不同动作任务下的表面肌电信号(s EMG)间的相干性分析,可以体现相应肌群的协同耦合关系,进而能从神经控制运动与肌肉相互配合协调的角度揭示运动产生与执行规律。组织8名年轻健康受试者(男女均半、20~24岁)进行上肢腕部屈、伸实验,采集动作时相应肌群的s EMG数据,引入非负矩阵分解(NMF)方法分析肌间协同性,并进一步对协同性较高的肌群采用一致性分析方法,研究信号beta(15~35 Hz)和gamma(35~60 Hz)频段的耦合强度关系,探讨腕部伸屈动作下不同受试者之间的协同-耦合性差异。结果表明:腕伸动作下,主动肌桡侧腕短伸肌(ECR)、指伸肌(ED)、尺侧腕伸肌(ECU)、肱桡肌(B)在协同模块W5中具有协同关系,且肌间耦合强度显著(P0.05),beta频段与gamma频段一致性显著面积相差较大(1.261±0.966);腕屈动作下,分别在协同模块W_1W_4W_5中存在具有协同关系的肌肉对,且肌肉间耦合强度显著(P0.001),在beta和gamma频段一致性显著面积相差较小(0.412±0.163),但主动肌桡侧腕屈肌、指浅屈肌间不具有协同性,耦合关系较弱。以上说明:神经控制运动的方式不同,体现为肌肉协同-耦合关系有所差异;在同一协同模块中,协同性较高的肌肉间耦合关系较强,揭示神经控制运动规律与肌肉相互配合方式;运用此方法进行肌间协同-耦合联合分析,可望深入揭示中枢神经模块化协同控制运动机制,进一步为运动障碍患者功能分析和评价提供科学依据。
[Abstract]:Muscle coordination model is a low-dimensional structure of nerve generation and control movement. The coherence analysis of surface electromyography (s EMG) signals under different action tasks can reflect the cooperative coupling relationship of the corresponding muscle groups. Furthermore, it can reveal the law of motion generation and execution from the angle of coordination between nerve control movement and muscle. Eight young healthy subjects (male and female, aged 20 to 24) were studied for wrist flexion and extention of upper limbs. S EMG data of the corresponding muscle groups were collected, and non-negative matrix factorization (NMF) was introduced to analyze the intermuscular synergy. Furthermore, the consistency analysis method was used to study the coupling strength relationship between beta (155Hz) and gamma (356Hz), and to explore the differences of synergetic coupling between different subjects under wrist flexion and extension. The results showed that the (ECU), brachioradialis muscle (B) of extensor carpal short muscle (ECR), extensor digitorum muscle (ED), ulnar extensor carpal muscle (ECU), radial muscle had a synergistic relationship in W5 under carpal extension. There was significant difference in the area of the consistency between the beta band and the gamma band (1.261 卤0.966). Under wrist flexion, there were synergistic muscle pairs in the synergetic module W_1W_4W_5, respectively. The strength of intermuscular coupling was significant (P0. 001), and the difference of the consistent area between beta and gamma was small (0.412 卤0.163), but there was no synergy between flexor carpi radialis and flexor digitorum superficial flexor, but the coupling relationship was weak. The results show that the way of neural control is different, which is reflected by the difference of muscle synergy and coupling; in the same cooperative module, there is a strong synergy between muscles. It is expected to reveal the mechanism of modular cooperative control of central nervous system by using this method to analyze the intermuscular synergetic and coupling joint analysis. To provide scientific basis for functional analysis and evaluation of patients with dyskinesia.
【作者单位】：燕山大学电气工程学院河北省测试计量技术及仪器重点实验室;
【基金】：国家自然科学基金(61271142,61503325) 河北省自然科学基金(F2015203372)
【分类号】：R318;TN911.6

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