Myocontrol in aging.

Myoelectric (EMG) signals are used in assistive technology for prostheses, computer and domestic control. An experimental study previously conducted with young participants was replicated with elderly persons in order to assess the effect of age on the ability to control myoelectric amplitude (or my...

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Autores principales:	Eric J Fimbel, Martin Arguin
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2007
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ad1cc08399d34d0aa305dd18266d5519
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spelling	oai:doaj.org-article:ad1cc08399d34d0aa305dd18266d55192021-11-25T06:13:49ZMyocontrol in aging.1932-620310.1371/journal.pone.0001219https://doaj.org/article/ad1cc08399d34d0aa305dd18266d55192007-11-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0001219https://doaj.org/toc/1932-6203Myoelectric (EMG) signals are used in assistive technology for prostheses, computer and domestic control. An experimental study previously conducted with young participants was replicated with elderly persons in order to assess the effect of age on the ability to control myoelectric amplitude (or myocontrol). Participants performed pointing tasks as the myoelectric amplitude was captured by a surface electrode in two modalities (sustained: stabilize the amplitude after reaching the desired level; impulsion: return immediately to resting amplitude). There was a significant decrease of performance with Age. However, the patterns of performance of young and aged were noticeably similar. The Impulsion modality was difficult (high rates of failure) and the speed-accuracy trade-offs predicted by Fitts' law were absent (bow-shaped patterns as function of target amplitude instead of logarithmic increase). Conversely, the reach phase of the Sustained modality followed the predictions of Fitts' law. However, the slope of the regression line with Fitts' index of difficulty was quite steeper in aged than in young participants. These findings suggest that 1) all participants, young and aged, adapt their reaching strategies to the anticipated state (sustained amplitude or not) and/or to the difficulty of the task, 2) myocontrol in aged persons is more fragile, i.e., performance is markedly degraded as the difficulty of the task increases. However, when individual performance was examined, some aged individuals were found to perform as well as the young participants, congruently with the literature on good aging.Eric J FimbelMartin ArguinPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 2, Iss 11, p e1219 (2007)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Eric J Fimbel Martin Arguin Myocontrol in aging.
description	Myoelectric (EMG) signals are used in assistive technology for prostheses, computer and domestic control. An experimental study previously conducted with young participants was replicated with elderly persons in order to assess the effect of age on the ability to control myoelectric amplitude (or myocontrol). Participants performed pointing tasks as the myoelectric amplitude was captured by a surface electrode in two modalities (sustained: stabilize the amplitude after reaching the desired level; impulsion: return immediately to resting amplitude). There was a significant decrease of performance with Age. However, the patterns of performance of young and aged were noticeably similar. The Impulsion modality was difficult (high rates of failure) and the speed-accuracy trade-offs predicted by Fitts' law were absent (bow-shaped patterns as function of target amplitude instead of logarithmic increase). Conversely, the reach phase of the Sustained modality followed the predictions of Fitts' law. However, the slope of the regression line with Fitts' index of difficulty was quite steeper in aged than in young participants. These findings suggest that 1) all participants, young and aged, adapt their reaching strategies to the anticipated state (sustained amplitude or not) and/or to the difficulty of the task, 2) myocontrol in aged persons is more fragile, i.e., performance is markedly degraded as the difficulty of the task increases. However, when individual performance was examined, some aged individuals were found to perform as well as the young participants, congruently with the literature on good aging.
format	article
author	Eric J Fimbel Martin Arguin
author_facet	Eric J Fimbel Martin Arguin
author_sort	Eric J Fimbel
title	Myocontrol in aging.
title_short	Myocontrol in aging.
title_full	Myocontrol in aging.
title_fullStr	Myocontrol in aging.
title_full_unstemmed	Myocontrol in aging.
title_sort	myocontrol in aging.
publisher	Public Library of Science (PLoS)
publishDate	2007
url	https://doaj.org/article/ad1cc08399d34d0aa305dd18266d5519
work_keys_str_mv	AT ericjfimbel myocontrolinaging AT martinarguin myocontrolinaging
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Myocontrol in aging.

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