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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...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2021
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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. |
format | Online Article Text |
id | pubmed-8602863 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT hujing agingaffectsthedemandsandpatternsinactivecontrolunderdifferentsensoryconflictedconditions AT chienjunghung agingaffectsthedemandsandpatternsinactivecontrolunderdifferentsensoryconflictedconditions |