基于表面肌电技术对人体上肢肌肉疲劳过程中中枢共驱动的研究

发布时间：2018-03-22 19:07

本文选题：表面肌电　切入点：疲劳　出处：《中国运动医学杂志》2017年04期 　论文类型：期刊论文

【摘要】：目的:使用表面肌电技术观察人体上肢近端肌肉运动疲劳过程中的中枢共驱动现象。方法:以16名非体育专业的男性大学生为研究对象,以受试者左臂为观察臂,右臂为负荷臂。负荷臂分别处于自然下垂无负荷的放松状态和连续完成负重5 kg哑铃的肘关节屈伸运动诱发疲劳状态;而观察臂手持4kg哑铃,肘关节始终保持屈曲90°,进行等长收缩直至力竭。同时使用ME6000表面肌电仪分别采集两种状态下观察臂肱二头肌和肱三头肌表面肌电信号,对时域指标积分肌电(IEMG)、均方根振幅(RMS),以及频域指标平均功率频率(MPF)、中位频率(MF)进行分析。结果:无论负荷臂处于自然放松状态还是动力性运动诱发疲劳状态,随着运动的进行,对侧观察臂肱二头肌、肱三头肌时域指标IEMG和RMS都逐渐升高(P0.05),但是在负荷臂疲劳状态时对侧观察臂肌肉的表面肌电时域指标IEMG和RMS增加幅度更加明显(P0.01),同时拮抗肌肱三头肌时域指标受到更强抑制;负荷臂疲劳状态下对侧观察臂肱二头肌肌电频域指标MPF和MF的变化比负荷臂自然放松状态下变化更大(P0.01),而拮抗肌肱三头肌的变化不大。结论:一侧肢体运动诱发肱二头肌肌肉疲劳能够使对侧肢体相关肌肉表面肌电的时域指标和频域指标产生伴随性的变化,说明人体上肢近端肌肉表面肌电信号的变化具有中枢共驱动的效应。
[Abstract]:Objective: to observe the central codrive phenomenon during the exercise fatigue of the proximal muscles of human upper extremity by surface electromyography. Methods: sixteen male college students of non-physical education and the left arm of the subjects were used as the subjects. The right arm is a load arm. The load arm is in the state of natural drooping and no load relaxation and the elbow joint flexion and extension induced by continuous load of 5 kg dumbbell, while the arm holding 4kg dumbbell is observed. At the same time, the elbow joint was kept flexion 90 掳, and the isometric contraction was carried out until exhausted. At the same time, the surface electromyography (EMG) of biceps brachii and triceps brachii were observed by ME6000 surface electromyograph. In this paper, the time domain index integral EMG (IEMG), root-mean-square amplitude (RMSG), and frequency domain mean power frequency (MPF), median frequency (MFF) are analyzed. Results: whether the load arm is in a natural relaxation state or in a dynamic motion-induced fatigue state, with the movement going on, Contralateral observation of the biceps brachii muscle, The time domain indexes of IEMG and RMS of triceps brachii increased gradually, but the time domain indexes of IEMG and RMS of the contralateral observing arm muscles were more obvious than that of P0.01in the fatigue state of arm, and the time domain indexes of antagonistic muscle triceps were inhibited more strongly. The changes of MPF and MF of biceps brachii muscle were observed on the contralateral side under fatigue condition compared with those under natural relaxation of load arm, but the change of triceps muscle of antagonistic muscle was not obvious. Conclusion: one side of limb motion induces the change of triceps muscle. The muscle fatigue of biceps brachii muscle can make the time domain index and frequency domain index of muscle surface electromyography (EMG) of the contralateral limb associated with muscle surface produce accompanying changes. It shows that the changes of EMG signal on the proximal muscle of human upper limb have the effect of central co-drive.
【作者单位】：沈阳体育学院运动人体科学学院生理生化教研室;
【基金】：辽宁省教育科学“十二五”规划2015年度研究基地专项课题(JG15ZXY09) 沈阳体育学院重点体育学科资助项目(XK-FX1512) 辽宁省教育厅科学技术研究一般课题(L2012412)
【分类号】：R87

【参考文献】