Muscle synergy differences between voluntary and reactive backward stepping

Abstract 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 co...

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Autores principales:	Shuaijie Wang, Gonzalo Varas-Diaz, Tanvi Bhatt
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/475df20ae2074afdb1fe00dc6c1ef686
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spelling	oai:doaj.org-article:475df20ae2074afdb1fe00dc6c1ef6862021-12-02T18:47:10ZMuscle synergy differences between voluntary and reactive backward stepping10.1038/s41598-021-94699-z2045-2322https://doaj.org/article/475df20ae2074afdb1fe00dc6c1ef6862021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94699-zhttps://doaj.org/toc/2045-2322Abstract 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.Shuaijie WangGonzalo Varas-DiazTanvi BhattNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shuaijie Wang Gonzalo Varas-Diaz Tanvi Bhatt Muscle synergy differences between voluntary and reactive backward stepping
description	Abstract 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.
format	article
author	Shuaijie Wang Gonzalo Varas-Diaz Tanvi Bhatt
author_facet	Shuaijie Wang Gonzalo Varas-Diaz Tanvi Bhatt
author_sort	Shuaijie Wang
title	Muscle synergy differences between voluntary and reactive backward stepping
title_short	Muscle synergy differences between voluntary and reactive backward stepping
title_full	Muscle synergy differences between voluntary and reactive backward stepping
title_fullStr	Muscle synergy differences between voluntary and reactive backward stepping
title_full_unstemmed	Muscle synergy differences between voluntary and reactive backward stepping
title_sort	muscle synergy differences between voluntary and reactive backward stepping
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/475df20ae2074afdb1fe00dc6c1ef686
work_keys_str_mv	AT shuaijiewang musclesynergydifferencesbetweenvoluntaryandreactivebackwardstepping AT gonzalovarasdiaz musclesynergydifferencesbetweenvoluntaryandreactivebackwardstepping AT tanvibhatt musclesynergydifferencesbetweenvoluntaryandreactivebackwardstepping
_version_	1718377618868273152

Muscle synergy differences between voluntary and reactive backward stepping

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