Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait

Abstract During steady-state walking, mediolateral gait stability can be maintained by controlling the center of pressure (CoP). The CoP modulates the moment of the ground reaction force, which brakes and reverses movement of the center of mass (CoM) towards the lateral border of the base of support...

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Autores principales:	A. M. van Leeuwen, J. H. van Dieën, A. Daffertshofer, S. M. Bruijn
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cdf2eda07c86418d9f137ff60e2c480a
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spelling	oai:doaj.org-article:cdf2eda07c86418d9f137ff60e2c480a2021-11-08T10:46:40ZAnkle muscles drive mediolateral center of pressure control to ensure stable steady state gait10.1038/s41598-021-00463-82045-2322https://doaj.org/article/cdf2eda07c86418d9f137ff60e2c480a2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00463-8https://doaj.org/toc/2045-2322Abstract During steady-state walking, mediolateral gait stability can be maintained by controlling the center of pressure (CoP). The CoP modulates the moment of the ground reaction force, which brakes and reverses movement of the center of mass (CoM) towards the lateral border of the base of support. In addition to foot placement, ankle moments serve to control the CoP. We hypothesized that, during steady-state walking, single stance ankle moments establish a CoP shift to correct for errors in foot placement. We expected ankle muscle activity to be associated with this complementary CoP shift. During treadmill walking, full-body kinematics, ground reaction forces and electromyography were recorded in thirty healthy participants. We found a negative relationship between preceding foot placement error and CoP displacement during single stance; steps that were too medial were compensated for by a lateral CoP shift and vice versa, steps that were too lateral were compensated for by a medial CoP shift. Peroneus longus, soleus and tibialis anterior activity correlated with these CoP shifts. As such, we identified an (active) ankle strategy during steady-state walking. As expected, absolute explained CoP variance by foot placement error decreased when walking with shoes constraining ankle moments. Yet, contrary to our expectations that ankle moment control would compensate for constrained foot placement, the absolute explained CoP variance by foot placement error did not increase when foot placement was constrained. We argue that this lack of compensation reflects the interdependent nature of ankle moment and foot placement control. We suggest that single stance ankle moments do not only compensate for preceding foot placement errors, but also assist control of the subsequent foot placement. Foot placement and ankle moment control are ‘caught’ in a circular relationship, in which constraints imposed on one will also influence the other.A. M. van LeeuwenJ. H. van DieënA. DaffertshoferS. M. BruijnNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. M. van Leeuwen J. H. van Dieën A. Daffertshofer S. M. Bruijn Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait
description	Abstract During steady-state walking, mediolateral gait stability can be maintained by controlling the center of pressure (CoP). The CoP modulates the moment of the ground reaction force, which brakes and reverses movement of the center of mass (CoM) towards the lateral border of the base of support. In addition to foot placement, ankle moments serve to control the CoP. We hypothesized that, during steady-state walking, single stance ankle moments establish a CoP shift to correct for errors in foot placement. We expected ankle muscle activity to be associated with this complementary CoP shift. During treadmill walking, full-body kinematics, ground reaction forces and electromyography were recorded in thirty healthy participants. We found a negative relationship between preceding foot placement error and CoP displacement during single stance; steps that were too medial were compensated for by a lateral CoP shift and vice versa, steps that were too lateral were compensated for by a medial CoP shift. Peroneus longus, soleus and tibialis anterior activity correlated with these CoP shifts. As such, we identified an (active) ankle strategy during steady-state walking. As expected, absolute explained CoP variance by foot placement error decreased when walking with shoes constraining ankle moments. Yet, contrary to our expectations that ankle moment control would compensate for constrained foot placement, the absolute explained CoP variance by foot placement error did not increase when foot placement was constrained. We argue that this lack of compensation reflects the interdependent nature of ankle moment and foot placement control. We suggest that single stance ankle moments do not only compensate for preceding foot placement errors, but also assist control of the subsequent foot placement. Foot placement and ankle moment control are ‘caught’ in a circular relationship, in which constraints imposed on one will also influence the other.
format	article
author	A. M. van Leeuwen J. H. van Dieën A. Daffertshofer S. M. Bruijn
author_facet	A. M. van Leeuwen J. H. van Dieën A. Daffertshofer S. M. Bruijn
author_sort	A. M. van Leeuwen
title	Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait
title_short	Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait
title_full	Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait
title_fullStr	Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait
title_full_unstemmed	Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait
title_sort	ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/cdf2eda07c86418d9f137ff60e2c480a
work_keys_str_mv	AT amvanleeuwen anklemusclesdrivemediolateralcenterofpressurecontroltoensurestablesteadystategait AT jhvandieen anklemusclesdrivemediolateralcenterofpressurecontroltoensurestablesteadystategait AT adaffertshofer anklemusclesdrivemediolateralcenterofpressurecontroltoensurestablesteadystategait AT smbruijn anklemusclesdrivemediolateralcenterofpressurecontroltoensurestablesteadystategait
_version_	1718442661930598400

Ankle muscles drive mediolateral center of pressure control to ensure stable steady state gait

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