Use of the extended feasible stability region for assessing stability of perturbed walking

Abstract Walking stability has been assessed through gait variability or existing biomechanical measures. However, such measures are unable to quantify the instantaneous risk of loss-of-balance as a function of gait parameters, body sway, and physiological and perturbation conditions. This study aim...

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Autores principales:	Hosein Bahari, Juan Forero, Jeremy C. Hall, Jacqueline S. Hebert, Albert H. Vette, Hossein Rouhani
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c7ff25a17c7c4aaa83ae670c591897bc
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spelling	oai:doaj.org-article:c7ff25a17c7c4aaa83ae670c591897bc2021-12-02T15:23:09ZUse of the extended feasible stability region for assessing stability of perturbed walking10.1038/s41598-020-79955-y2045-2322https://doaj.org/article/c7ff25a17c7c4aaa83ae670c591897bc2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79955-yhttps://doaj.org/toc/2045-2322Abstract Walking stability has been assessed through gait variability or existing biomechanical measures. However, such measures are unable to quantify the instantaneous risk of loss-of-balance as a function of gait parameters, body sway, and physiological and perturbation conditions. This study aimed to introduce and evaluate novel biomechanical measures for loss-of-balance under various perturbed walking conditions. We introduced the concept of ‘Extended Feasible Stability Region (ExFSR)’ that characterizes walking stability for the duration of an entire step. We proposed novel stability measures based on the proximity of the body’s centre of mass (COM) position and velocity to the ExFSR limits. We quantified perturbed walking of fifteen non-disabled individuals and three individuals with a disability, and calculated our proposed ExFSR-based measures. 17.2% (32.5%) and 26.3% (34.0%) of the measured trajectories of the COM position and velocity during low (high) perturbations went outside the ExFSR limits, for non-disabled and disabled individuals, respectively. Besides, our proposed measures significantly correlated with measures previously suggested in the literature to assess gait stability, indicating a similar trend in gait stability revealed by them. The ExFSR-based measures facilitate our understanding on the biomechanical mechanisms of loss-of-balance and can contribute to the development of strategies for balance assessment.Hosein BahariJuan ForeroJeremy C. HallJacqueline S. HebertAlbert H. VetteHossein RouhaniNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hosein Bahari Juan Forero Jeremy C. Hall Jacqueline S. Hebert Albert H. Vette Hossein Rouhani Use of the extended feasible stability region for assessing stability of perturbed walking
description	Abstract Walking stability has been assessed through gait variability or existing biomechanical measures. However, such measures are unable to quantify the instantaneous risk of loss-of-balance as a function of gait parameters, body sway, and physiological and perturbation conditions. This study aimed to introduce and evaluate novel biomechanical measures for loss-of-balance under various perturbed walking conditions. We introduced the concept of ‘Extended Feasible Stability Region (ExFSR)’ that characterizes walking stability for the duration of an entire step. We proposed novel stability measures based on the proximity of the body’s centre of mass (COM) position and velocity to the ExFSR limits. We quantified perturbed walking of fifteen non-disabled individuals and three individuals with a disability, and calculated our proposed ExFSR-based measures. 17.2% (32.5%) and 26.3% (34.0%) of the measured trajectories of the COM position and velocity during low (high) perturbations went outside the ExFSR limits, for non-disabled and disabled individuals, respectively. Besides, our proposed measures significantly correlated with measures previously suggested in the literature to assess gait stability, indicating a similar trend in gait stability revealed by them. The ExFSR-based measures facilitate our understanding on the biomechanical mechanisms of loss-of-balance and can contribute to the development of strategies for balance assessment.
format	article
author	Hosein Bahari Juan Forero Jeremy C. Hall Jacqueline S. Hebert Albert H. Vette Hossein Rouhani
author_facet	Hosein Bahari Juan Forero Jeremy C. Hall Jacqueline S. Hebert Albert H. Vette Hossein Rouhani
author_sort	Hosein Bahari
title	Use of the extended feasible stability region for assessing stability of perturbed walking
title_short	Use of the extended feasible stability region for assessing stability of perturbed walking
title_full	Use of the extended feasible stability region for assessing stability of perturbed walking
title_fullStr	Use of the extended feasible stability region for assessing stability of perturbed walking
title_full_unstemmed	Use of the extended feasible stability region for assessing stability of perturbed walking
title_sort	use of the extended feasible stability region for assessing stability of perturbed walking
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c7ff25a17c7c4aaa83ae670c591897bc
work_keys_str_mv	AT hoseinbahari useoftheextendedfeasiblestabilityregionforassessingstabilityofperturbedwalking AT juanforero useoftheextendedfeasiblestabilityregionforassessingstabilityofperturbedwalking AT jeremychall useoftheextendedfeasiblestabilityregionforassessingstabilityofperturbedwalking AT jacquelineshebert useoftheextendedfeasiblestabilityregionforassessingstabilityofperturbedwalking AT alberthvette useoftheextendedfeasiblestabilityregionforassessingstabilityofperturbedwalking AT hosseinrouhani useoftheextendedfeasiblestabilityregionforassessingstabilityofperturbedwalking
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Use of the extended feasible stability region for assessing stability of perturbed walking

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