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Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions

Most falls might be attributed to an unexpected perturbation such as a slip. It might be aggravated by the deterioration of the sensory system as people aged. This deterioration increases the demand in active control. However, what levels of demand in active control do older adults need? This study...

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Detalles Bibliográficos
Autores principales: Hu, Jing, Chien, Jung Hung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8602863/
https://www.ncbi.nlm.nih.gov/pubmed/34803656
http://dx.doi.org/10.3389/fnagi.2021.742035
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author Hu, Jing
Chien, Jung Hung
author_facet Hu, Jing
Chien, Jung Hung
author_sort Hu, Jing
collection PubMed
description Most falls might be attributed to an unexpected perturbation such as a slip. It might be aggravated by the deterioration of the sensory system as people aged. This deterioration increases the demand in active control. However, what levels of demand in active control do older adults need? This study aimed to answer this question by using a novel assessment. Both young and old adults walked in three conditions: normal, slip, and slip with low light conditions. The amount of step length variability, step width variability, and the 95% confidence interval of the ellipse area of heel contact locations was measured to quantify and distinguish different levels of demand and patterns in active control. The results found that less sensory information led to a higher level of demand in active control in both anterior-posterior and medial-lateral directions. Importantly, different patterns in active control were found among different age groups and perturbation conditions. This study extended the current knowledge and further proposed the possibility of multiple patterns in active control. This study also suggests a new method to quantify the levels and patterns in active control under sensory perturbations, and this innovation can be used to guide age-related fall prevention training.
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spelling pubmed-86028632021-11-20 Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions Hu, Jing Chien, Jung Hung Front Aging Neurosci Neuroscience Most falls might be attributed to an unexpected perturbation such as a slip. It might be aggravated by the deterioration of the sensory system as people aged. This deterioration increases the demand in active control. However, what levels of demand in active control do older adults need? This study aimed to answer this question by using a novel assessment. Both young and old adults walked in three conditions: normal, slip, and slip with low light conditions. The amount of step length variability, step width variability, and the 95% confidence interval of the ellipse area of heel contact locations was measured to quantify and distinguish different levels of demand and patterns in active control. The results found that less sensory information led to a higher level of demand in active control in both anterior-posterior and medial-lateral directions. Importantly, different patterns in active control were found among different age groups and perturbation conditions. This study extended the current knowledge and further proposed the possibility of multiple patterns in active control. This study also suggests a new method to quantify the levels and patterns in active control under sensory perturbations, and this innovation can be used to guide age-related fall prevention training. Frontiers Media S.A. 2021-11-05 /pmc/articles/PMC8602863/ /pubmed/34803656 http://dx.doi.org/10.3389/fnagi.2021.742035 Text en Copyright © 2021 Hu and Chien. https://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 Neuroscience
Hu, Jing
Chien, Jung Hung
Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions
title Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions
title_full Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions
title_fullStr Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions
title_full_unstemmed Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions
title_short Aging Affects the Demands and Patterns in Active Control Under Different Sensory-Conflicted Conditions
title_sort aging affects the demands and patterns in active control under different sensory-conflicted conditions
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8602863/
https://www.ncbi.nlm.nih.gov/pubmed/34803656
http://dx.doi.org/10.3389/fnagi.2021.742035
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