Muscle synergy differences between voluntary and reactive backward stepping.
Muscle synergy differences between voluntary and reactive backward stepping.
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DOI：
10.1038/s41598-021-94699-z
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发表时间：
2021-07-29
影响因子：
4.6
通讯作者：
Bhatt T
中科院分区：
文献类型：
--
作者：
Wang S;Varas-Diaz G;Bhatt T
反应性踏步反应对于防止失去平衡后的福尔斯跌倒至关重要。以前已经很好地描述了自愿和反应步骤训练可以提高不同人群中反应步骤的功效。然而，在自愿和反应性踏步过程中，年龄对神经肌肉控制的影响仍不清楚。记录了10名健康年轻人和10名健康老年人的肌电图（EMG）信号，在这两个向后自愿步进响应于听觉提示和向后反应性步进引起的向前滑样跑步机扰动在立场。使用肌肉协同分析，我们提取了自愿和反应性步进的肌肉协同作用。我们的研究结果表明，较少的肌肉协同作用，在反应步骤比在自愿步进在年轻人和老年人。年龄组之间的自愿和反应步骤的协同结构中观察到微小的差异。我们的研究结果表明，有一个低相似性的肌肉协同作用之间的自愿步进和反应步进和老化的肌肉协同作用的结构上的影响有限。这项研究增强了我们对自愿和反应性踏步的神经肌肉基础以及平衡任务中年龄对神经肌肉控制的潜在影响的理解。
Reactive stepping responses are essential to prevent falls after a loss of balance. It has previously been well described that both voluntary and reactive step training could improve the efficacy of reactive stepping in different populations. However, the effect of aging on neuromuscular control during voluntary and reactive stepping remains unclear. Electromyography (EMG) signals during both backward voluntary stepping in response to an auditory cue and backward reactive stepping elicited by a forward slip-like treadmill perturbation during stance were recorded in ten healthy young adults and ten healthy older adults. Using muscle synergy analysis, we extracted the muscle synergies for both voluntary and reactive stepping. Our results showed that fewer muscle synergies were used during reactive stepping than during voluntary stepping in both young and older adults. Minor differences in the synergy structure were observed for both voluntary and reactive stepping between age groups. Our results indicate that there is a low similarity of muscle synergies between voluntary stepping and reactive stepping and that aging had a limited effect on the structure of muscle synergies. This study enhances our understanding of the neuromuscular basis of both voluntary and reactive stepping as well as the potential effect of aging on neuromuscular control during balance tasks.
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DOI：
10.1523/jneurosci.6344-11.2012
发表时间：
2012-08-29
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Chvatal SA;Ting LH
通讯作者：
Ting LH
影响因子：
1.6
作者：
Chomiak, Taylor;Watts, Alexander;Hu, Bin
通讯作者：
Hu, Bin
影响因子：
2.4
作者：
Crenshaw, Jeremy R.;Grabiner, Mark D.
通讯作者：
Grabiner, Mark D.
影响因子：
5.5
作者：
Gritsenko, V;Mushahwar, V;Prochazka, A
通讯作者：
Prochazka, A
影响因子：
2.5
作者：
Chvatal, Stacie A.;Torres-Oviedo, Gelsy;Ting, Lena H.
通讯作者：
Ting, Lena H.