Co-contraction of antagonist muscles during knee extension against gravity: Insights for functional electrical stimulation control design
Co-contraction of antagonist muscles during knee extension against gravity: Insights for functional electrical stimulation control design
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DOI：
10.1109/embc.2012.6346310
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
C. Lynch;D. Sayenko;M. Popovic
中科院分区：
文献类型：
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作者：
C. Lynch;D. Sayenko;M. Popovic
功能性电刺激（FES）涉及电刺激神经肌肉系统以在瘫痪的肌肉中产生骨骼肌收缩。已经提出了几种新的FES应用，需要闭环控制系统。拮抗肌群的共同收缩被认为是FES系统闭环控制的一种有前途的方法。然而，这种控制方法尚未被用于实际的FES应用，部分原因是缺乏有关健全的受试者如何使用拮抗肌的共同收缩在标准的控制测试，如单位步骤和正弦响应的信息。本研究的目的是通过分析膝关节反重力伸直过程中拮抗肌的肌电活动，来阐明身体健全的人是如何使用协同收缩的。结果清楚地表明，健全的科目使用的共同收缩策略时，执行标准的控制性能测试，并加强使用共同收缩策略的闭环FES控制算法的论点。这些数据将为FES应用开发新的有效控制器提供信息。
Functional electrical stimulation (FES) involves electrically stimulating the neuromuscular system to generate skeletal muscle contractions in paralyzed muscles. Several new FES applications have been proposed that require closed-loop control systems. Co-contraction of antagonist muscle groups has been postulated as a promising approach for closed-loop control of FES systems. However, this control approach has not yet been used in practical FES applications, in part due to a lack of information concerning how able-bodied subjects use co-contraction of antagonist muscles during standard control tests such as unit step and sinusoidal responses. The purpose of this work is to elucidate how able-bodied individuals use co-contraction by analyzing the EMG activity of antagonist muscles during voluntary knee extension against gravity. The results clearly demonstrate that able-bodied subjects use a co-contraction strategy when executing standard control performance tests, and strengthen the argument for using a co-contraction strategy for closed-loop FES control algorithms. These data will inform the development of new and effective controllers for FES applications.