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Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking

Lower-limb intersegmental coordination is a complex component of human walking. Aging may result in impairments of motor control and coordination contributing to the decline in mobility inducing loss of autonomy. Investigating intersegmental coordination could therefore provide insights into age-rel...

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Autores principales: Gueugnon, Mathieu, Stapley, Paul J., Gouteron, Anais, Lecland, Cécile, Morisset, Claire, Casillas, Jean-Marie, Ornetti, Paul, Laroche, Davy
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6652268/
https://www.ncbi.nlm.nih.gov/pubmed/31380364
http://dx.doi.org/10.3389/fbioe.2019.00173
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author Gueugnon, Mathieu
Stapley, Paul J.
Gouteron, Anais
Lecland, Cécile
Morisset, Claire
Casillas, Jean-Marie
Ornetti, Paul
Laroche, Davy
author_facet Gueugnon, Mathieu
Stapley, Paul J.
Gouteron, Anais
Lecland, Cécile
Morisset, Claire
Casillas, Jean-Marie
Ornetti, Paul
Laroche, Davy
author_sort Gueugnon, Mathieu
collection PubMed
description Lower-limb intersegmental coordination is a complex component of human walking. Aging may result in impairments of motor control and coordination contributing to the decline in mobility inducing loss of autonomy. Investigating intersegmental coordination could therefore provide insights into age-related changes in neuromuscular control of gait. However, it is unknown whether the age-related declines in gait performance relates to intersegmental coordination. The aim of this study was to evaluate the impact of aging on the coordination of lower limb kinematics and kinetics during walking at a conformable speed. We then assessed the body kinematics and kinetics from gait analyses of 84 volunteers from 25 to 85 years old when walking was performed at their self-selected speeds. Principal Component Analysis (PCA) was used to assess lower-limb intersegmental coordination and to evaluate the planar covariation of the Shank-Thigh and Foot-Shank segments. Ankle and knee stiffness were also estimated. Age-related effects on planar covariation parameters was evaluated using multiple linear regressions (i.e., without a priori age group determination) adjusted to normalized self-selected gait velocity. Colinearity between parameters was assessed using a variation inflation factor (VIF) and those with a VIF < 5 were entered in the analysis. Normalized gait velocity significantly decreased with aging (r = −0.24; P = 0.028). Planar covariation of inter-segmental coordination was consistent across age (99.3 ± 0.24% of explained variance of PCA). Significant relationships were found between age and intersegmental foot-shank coordination, range of motion of the ankle, maximal power of the knee, and the ankle. Lower-limb coordination was modified with age, particularly the coordination between foot, and shank. Such modifications may influence the ankle motion and thus, ankle power. This observation may explain the decrease in the ankle plantar flexor strength mainly reported in the literature. We therefore hypothesize that this modification of coordination constitutes a neuromuscular adaptation of gait control accompanying a loss of ankle strength and amplitude by increasing the knee power in order to maintain gait efficiency. We propose that foot-shank coordination might represent a valid outcome measure to estimate the efficacy of rehabilitative strategies and to evaluate their efficiency in restoring lower-limb synergies during walking.
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spelling pubmed-66522682019-08-02 Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking Gueugnon, Mathieu Stapley, Paul J. Gouteron, Anais Lecland, Cécile Morisset, Claire Casillas, Jean-Marie Ornetti, Paul Laroche, Davy Front Bioeng Biotechnol Bioengineering and Biotechnology Lower-limb intersegmental coordination is a complex component of human walking. Aging may result in impairments of motor control and coordination contributing to the decline in mobility inducing loss of autonomy. Investigating intersegmental coordination could therefore provide insights into age-related changes in neuromuscular control of gait. However, it is unknown whether the age-related declines in gait performance relates to intersegmental coordination. The aim of this study was to evaluate the impact of aging on the coordination of lower limb kinematics and kinetics during walking at a conformable speed. We then assessed the body kinematics and kinetics from gait analyses of 84 volunteers from 25 to 85 years old when walking was performed at their self-selected speeds. Principal Component Analysis (PCA) was used to assess lower-limb intersegmental coordination and to evaluate the planar covariation of the Shank-Thigh and Foot-Shank segments. Ankle and knee stiffness were also estimated. Age-related effects on planar covariation parameters was evaluated using multiple linear regressions (i.e., without a priori age group determination) adjusted to normalized self-selected gait velocity. Colinearity between parameters was assessed using a variation inflation factor (VIF) and those with a VIF < 5 were entered in the analysis. Normalized gait velocity significantly decreased with aging (r = −0.24; P = 0.028). Planar covariation of inter-segmental coordination was consistent across age (99.3 ± 0.24% of explained variance of PCA). Significant relationships were found between age and intersegmental foot-shank coordination, range of motion of the ankle, maximal power of the knee, and the ankle. Lower-limb coordination was modified with age, particularly the coordination between foot, and shank. Such modifications may influence the ankle motion and thus, ankle power. This observation may explain the decrease in the ankle plantar flexor strength mainly reported in the literature. We therefore hypothesize that this modification of coordination constitutes a neuromuscular adaptation of gait control accompanying a loss of ankle strength and amplitude by increasing the knee power in order to maintain gait efficiency. We propose that foot-shank coordination might represent a valid outcome measure to estimate the efficacy of rehabilitative strategies and to evaluate their efficiency in restoring lower-limb synergies during walking. Frontiers Media S.A. 2019-07-17 /pmc/articles/PMC6652268/ /pubmed/31380364 http://dx.doi.org/10.3389/fbioe.2019.00173 Text en Copyright © 2019 Gueugnon, Stapley, Gouteron, Lecland, Morisset, Casillas, Ornetti and Laroche. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Bioengineering and Biotechnology
Gueugnon, Mathieu
Stapley, Paul J.
Gouteron, Anais
Lecland, Cécile
Morisset, Claire
Casillas, Jean-Marie
Ornetti, Paul
Laroche, Davy
Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking
title Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking
title_full Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking
title_fullStr Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking
title_full_unstemmed Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking
title_short Age-Related Adaptations of Lower Limb Intersegmental Coordination During Walking
title_sort age-related adaptations of lower limb intersegmental coordination during walking
topic Bioengineering and Biotechnology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6652268/
https://www.ncbi.nlm.nih.gov/pubmed/31380364
http://dx.doi.org/10.3389/fbioe.2019.00173
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