人体步态滑跌过程中的下肢表面肌电特性研究

发布时间：2018-01-09 09:23

本文关键词：人体步态滑跌过程中的下肢表面肌电特性研究　出处：《中国生物医学工程学报》2017年02期 　论文类型：期刊论文

【摘要】：通过分析在意外滑移恢复和跌倒两种情况下人体髋、膝、踝3个关节不同肌肉群肌电信号的反应差异,研究髋、膝和踝3个关节运动对滑后恢复平衡的作用。试验招募10名年轻的健康受试者,要求其沿着指定的直线步道行走,并使其在行走过程中发生意外滑移。通过分析所测得的肌电信号,得出不同肌肉群的肌肉激活延迟时间、肌电信号峰值、到达峰值时间、协同收缩率等参数。研究结果显示,恢复平衡和跌倒之间肌肉激活延迟时间并没有显著性差异(P0.05),而股内侧肌的肌电峰值分别为70.2±9.8和89.0±12.7,有显著性差异(P0.05),胫骨前肌和半腱肌的距峰时间有显著性差异,P值分别为0.038、0.030(P0.05),股二头肌距峰时间无显著性差异(P=0.0620.05)。上述结果表明,在人体发生意外滑移后,对重新恢复人体平衡起作用的下肢关节肌肉激活时刻差别不大,但针对不同的关节运动,其肌肉伸缩程度以及肌肉做功不尽相同。根据肌肉所属关节及实验数据可知:增大踝关节背屈运动、膝关节屈曲运动和髋关节的伸展运动,对滑移后的平衡恢复作用显著。研究结果可以更好地揭示人体步态滑跌行为的内在机理,为各工作场所建立防滑策略提供有效的准则。
[Abstract]:By analyzing the differences of EMG signals in the three joints of human hip, knee and ankle under the condition of accidental slip recovery and fall, the hip was studied. The effects of knee and ankle joint exercise on balance recovery after sliding. Ten young healthy subjects were recruited and asked to walk along a designated straight track. By analyzing the measured EMG signals, the delay time of muscle activation, the peak value of EMG signal and the time of reaching the peak value of EMG signal of different muscle groups are obtained. The results showed that there was no significant difference in the delayed time of muscle activation between rebalancing and falling down (P 0.05). The peak value of myoelectric activity in medial femoral muscle was 70.2 卤9.8 and 89.0 卤12.7respectively, there was significant difference in the distance between anterior tibial muscle and semitendinosus muscle (P0.05), and there was significant difference in the distance between anterior tibial muscle and semitendinosus muscle. P values were 0.038, 0.030 and P0.05, respectively, and there was no significant difference in the distance between the biceps femoris and the peak time. The above results indicated that there was no significant difference in the distance between the biceps femoris and the peak time. The above results indicated that there was an accidental slip in the human body. The activation time of lower extremity joint muscle which can restore the balance of human body is not different, but it is aimed at different joint movement. According to the data of the joint and experiment, we can know: increase ankle flexion, knee flexion and hip extension. The results can better reveal the inherent mechanism of human gait slip behavior and provide effective criteria for the establishment of anti-slip strategies in various workplaces.
【作者单位】：天津科技大学机械工程学院天津市轻工与食品工程机械装备集成设计与在线监控重点实验室;
【基金】：天津市自然科学基金(16JCZDJC35900,14ZCZDSY00010) 高等学校博士学科点专项科研基金(20131208110005)
【分类号】：R741.044;TN911.6
【正文快照】： 引言目前,导致人体步态失稳最常见的外界干扰是地面湿滑[1],由于步道湿滑而引起的跌倒是职业环境中比较严重的安全问题之一[2]。有文献指出,滑跌是工业生产过程中的主要意外事故,占职业意外伤害的一半左右[3]。而在社会生活中滑跌造成的损伤也占到家庭事故的20%,公共场所事故

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