Effects of muscle relaxation on sustained contraction of ipsilateral remote muscle.
Effects of muscle relaxation on sustained contraction of ipsilateral remote muscle.
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DOI：
10.14814/phy2.12620
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发表时间：
2015-11
影响因子：
2.5
通讯作者：
Kanosue K
中科院分区：
文献类型：
--
作者：
Kato K;Watanabe T;Kanosue K
本研究的目的是阐明同侧远端肌肉放松期间肌肉活动的时间变化。当参与者保持恒定的右腕伸肌等长力时，他们响应音频信号将同侧脚踝从静止位置背屈或从背屈位置放松。与静息状态相比，在足部收缩开始后 0-400 毫秒内，腕伸肌力大小有所增加（P < 0.05）。另一方面，与静息状态相比，踝关节背屈开始后 0-400 毫秒期间，腕部伸肌力大小和肌电图 (EMG) 活动有所下降 (P < 0.05)。我们的研究结果表明，足部肌肉放松会导致手部肌肉肌电图活动和力量大小暂时减少。
The objective of this study was to clarify the temporal change of muscle activity during relaxation of ipsilateral remote muscles. While participants maintained a constant right wrist extensor isometric force, they dorsiflexed the ipsilateral ankle from resting position or relaxed from dorsiflexed position in response to an audio signal. The wrist extensor force magnitude increased in the 0–400 msec period after the onset of foot contraction compared to that of the resting condition (P < 0.05). On the other hand, wrist extensor force magnitude and electromyographic (EMG) activity decreased in the 0–400 msec period after the onset of ankle dorsiflexion compared to that of the resting condition (P < 0.05). Our findings suggest that foot muscle relaxation induces temporal reduction in hand muscle EMG activity and force magnitude.