Stabilization demands of walking modulate the vestibular contributions to gait

Abstract Stable walking relies critically on motor responses to signals of head motion provided by the vestibular system, which are phase-dependent and modulated differently within each muscle. It is unclear, however, whether these vestibular contributions also vary according to the stability of the...

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Autores principales:	Rina M. Magnani, Sjoerd M. Bruijn, Jaap H. van Dieën, Patrick A. Forbes
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dcd87e350a264bfaab6b969dd9dd2ab3
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spelling	oai:doaj.org-article:dcd87e350a264bfaab6b969dd9dd2ab32021-12-02T16:10:37ZStabilization demands of walking modulate the vestibular contributions to gait10.1038/s41598-021-93037-72045-2322https://doaj.org/article/dcd87e350a264bfaab6b969dd9dd2ab32021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93037-7https://doaj.org/toc/2045-2322Abstract Stable walking relies critically on motor responses to signals of head motion provided by the vestibular system, which are phase-dependent and modulated differently within each muscle. It is unclear, however, whether these vestibular contributions also vary according to the stability of the walking task. Here we investigate how vestibular signals influence muscles relevant for gait stability (medial gastrocnemius, gluteus medius and erector spinae)—as well as their net effect on ground reaction forces—while humans walked normally, with mediolateral stabilization, wide and narrow steps. We estimated local dynamic stability of trunk kinematics together with coherence of electrical vestibular stimulation (EVS) with muscle activity and mediolateral ground reaction forces. Walking with external stabilization increased local dynamic stability and decreased coherence between EVS and all muscles/forces compared to normal walking. Wide-base walking also decreased vestibulomotor coherence, though local dynamic stability did not differ. Conversely, narrow-base walking increased local dynamic stability, but produced muscle-specific increases and decreases in coherence that resulted in a net increase in vestibulomotor coherence with ground reaction forces. Overall, our results show that while vestibular contributions may vary with gait stability, they more critically depend on the stabilization demands (i.e. control effort) needed to maintain a stable walking pattern.Rina M. MagnaniSjoerd M. BruijnJaap H. van DieënPatrick A. ForbesNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rina M. Magnani Sjoerd M. Bruijn Jaap H. van Dieën Patrick A. Forbes Stabilization demands of walking modulate the vestibular contributions to gait
description	Abstract Stable walking relies critically on motor responses to signals of head motion provided by the vestibular system, which are phase-dependent and modulated differently within each muscle. It is unclear, however, whether these vestibular contributions also vary according to the stability of the walking task. Here we investigate how vestibular signals influence muscles relevant for gait stability (medial gastrocnemius, gluteus medius and erector spinae)—as well as their net effect on ground reaction forces—while humans walked normally, with mediolateral stabilization, wide and narrow steps. We estimated local dynamic stability of trunk kinematics together with coherence of electrical vestibular stimulation (EVS) with muscle activity and mediolateral ground reaction forces. Walking with external stabilization increased local dynamic stability and decreased coherence between EVS and all muscles/forces compared to normal walking. Wide-base walking also decreased vestibulomotor coherence, though local dynamic stability did not differ. Conversely, narrow-base walking increased local dynamic stability, but produced muscle-specific increases and decreases in coherence that resulted in a net increase in vestibulomotor coherence with ground reaction forces. Overall, our results show that while vestibular contributions may vary with gait stability, they more critically depend on the stabilization demands (i.e. control effort) needed to maintain a stable walking pattern.
format	article
author	Rina M. Magnani Sjoerd M. Bruijn Jaap H. van Dieën Patrick A. Forbes
author_facet	Rina M. Magnani Sjoerd M. Bruijn Jaap H. van Dieën Patrick A. Forbes
author_sort	Rina M. Magnani
title	Stabilization demands of walking modulate the vestibular contributions to gait
title_short	Stabilization demands of walking modulate the vestibular contributions to gait
title_full	Stabilization demands of walking modulate the vestibular contributions to gait
title_fullStr	Stabilization demands of walking modulate the vestibular contributions to gait
title_full_unstemmed	Stabilization demands of walking modulate the vestibular contributions to gait
title_sort	stabilization demands of walking modulate the vestibular contributions to gait
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/dcd87e350a264bfaab6b969dd9dd2ab3
work_keys_str_mv	AT rinammagnani stabilizationdemandsofwalkingmodulatethevestibularcontributionstogait AT sjoerdmbruijn stabilizationdemandsofwalkingmodulatethevestibularcontributionstogait AT jaaphvandieen stabilizationdemandsofwalkingmodulatethevestibularcontributionstogait AT patrickaforbes stabilizationdemandsofwalkingmodulatethevestibularcontributionstogait
_version_	1718384441242419200

Stabilization demands of walking modulate the vestibular contributions to gait

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