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Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations
The aim of this study was to examine the effect of mental fatigue on postural sway under different sensory conditions in healthy older adults and in persons with chronic stroke (PwCS). Thirty healthy older adults (> 60 years old), randomly separated into experimental and control groups, as well a...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7349503/ https://www.ncbi.nlm.nih.gov/pubmed/32575383 http://dx.doi.org/10.3390/brainsci10060388 |
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author | Varas-Diaz, Gonzalo Kannan, Lakshmi Bhatt, Tanvi |
author_facet | Varas-Diaz, Gonzalo Kannan, Lakshmi Bhatt, Tanvi |
author_sort | Varas-Diaz, Gonzalo |
collection | PubMed |
description | The aim of this study was to examine the effect of mental fatigue on postural sway under different sensory conditions in healthy older adults and in persons with chronic stroke (PwCS). Thirty healthy older adults (> 60 years old), randomly separated into experimental and control groups, as well as 15 PwCS participated in this study. Experimental groups were asked to stand on a force platform wearing seven inertial sensors while performing the Sensory Organization Test (SOT) under two cognitive conditions (single- and dual-task) before and after a mental fatigue task (stop-signal task for 60 min). The control group performed the same protocol before and after watching a movie for 60 min. Changes in subjective fatigue was assessed by the NASA Task Load Index and psychophysiological workload was assessed by heart rate variability (HRV). Postural sway was assessed by calculating the Jerk and root mean square (RMS) of center of mass (COM). Higher Jerk and RMS of COM (p < 0.05) were observed after the mental fatigue task in both healthy older adults and PwCS during SOT, which was not observed in the control group (p > 0.05). Additionally, postural sway increased in the three groups as the SOT conditions became more challenging. Our results indicate that mental fatigue, induced by sustained cognitive activity, can impair balance during SOT in older adult and stroke populations. |
format | Online Article Text |
id | pubmed-7349503 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-73495032020-07-14 Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations Varas-Diaz, Gonzalo Kannan, Lakshmi Bhatt, Tanvi Brain Sci Article The aim of this study was to examine the effect of mental fatigue on postural sway under different sensory conditions in healthy older adults and in persons with chronic stroke (PwCS). Thirty healthy older adults (> 60 years old), randomly separated into experimental and control groups, as well as 15 PwCS participated in this study. Experimental groups were asked to stand on a force platform wearing seven inertial sensors while performing the Sensory Organization Test (SOT) under two cognitive conditions (single- and dual-task) before and after a mental fatigue task (stop-signal task for 60 min). The control group performed the same protocol before and after watching a movie for 60 min. Changes in subjective fatigue was assessed by the NASA Task Load Index and psychophysiological workload was assessed by heart rate variability (HRV). Postural sway was assessed by calculating the Jerk and root mean square (RMS) of center of mass (COM). Higher Jerk and RMS of COM (p < 0.05) were observed after the mental fatigue task in both healthy older adults and PwCS during SOT, which was not observed in the control group (p > 0.05). Additionally, postural sway increased in the three groups as the SOT conditions became more challenging. Our results indicate that mental fatigue, induced by sustained cognitive activity, can impair balance during SOT in older adult and stroke populations. MDPI 2020-06-19 /pmc/articles/PMC7349503/ /pubmed/32575383 http://dx.doi.org/10.3390/brainsci10060388 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Varas-Diaz, Gonzalo Kannan, Lakshmi Bhatt, Tanvi Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations |
title | Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations |
title_full | Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations |
title_fullStr | Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations |
title_full_unstemmed | Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations |
title_short | Effect of Mental Fatigue on Postural Sway in Healthy Older Adults and Stroke Populations |
title_sort | effect of mental fatigue on postural sway in healthy older adults and stroke populations |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7349503/ https://www.ncbi.nlm.nih.gov/pubmed/32575383 http://dx.doi.org/10.3390/brainsci10060388 |
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