Extreme levels of noise constitute a key neuromuscular deficit in the elderly.

Fluctuations during isometric force production tasks occur due to the inability of musculature to generate purely constant submaximal forces and are considered to be an estimation of neuromuscular noise. The human sensori-motor system regulates complex interactions between multiple afferent and effe...

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Autores principales:	Navrag B Singh, Niklas König, Adamantios Arampatzis, Markus O Heller, William R Taylor
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ddd2cdf57f1942c6ad8bf47fb0e0271f
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spelling	oai:doaj.org-article:ddd2cdf57f1942c6ad8bf47fb0e0271f2021-11-18T08:09:56ZExtreme levels of noise constitute a key neuromuscular deficit in the elderly.1932-620310.1371/journal.pone.0048449https://doaj.org/article/ddd2cdf57f1942c6ad8bf47fb0e0271f2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23139783/?tool=EBIhttps://doaj.org/toc/1932-6203Fluctuations during isometric force production tasks occur due to the inability of musculature to generate purely constant submaximal forces and are considered to be an estimation of neuromuscular noise. The human sensori-motor system regulates complex interactions between multiple afferent and efferent systems, which results in variability during functional task performance. Since muscles are the only active component of the motor system, it therefore seems reasonable that neuromuscular noise plays a key role in governing variability during both standing and walking. Seventy elderly women (including 34 fallers) performed multiple repetitions of isometric force production, quiet standing and walking tasks. No relationship between neuromuscular noise and functional task performance was observed in either the faller or the non-faller cohorts. When classified into groups with either nominal (group NOM, 25(th) -75(th) percentile) or extreme (either too high or too low, group EXT) levels of neuromuscular noise, group NOM demonstrated a clear association (r(2)>0.23, p<0.05) between neuromuscular noise and variability during task performance. On the other hand, group EXT demonstrated no such relationship, but also tended to walk slower, and had lower stride lengths, as well as lower isometric strength. These results suggest that neuromuscular noise is related to the quality of both static and dynamic functional task performance, but also that extreme levels of neuromuscular noise constitute a key neuromuscular deficit in the elderly.Navrag B SinghNiklas KönigAdamantios ArampatzisMarkus O HellerWilliam R TaylorPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 11, p e48449 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Navrag B Singh Niklas König Adamantios Arampatzis Markus O Heller William R Taylor Extreme levels of noise constitute a key neuromuscular deficit in the elderly.
description	Fluctuations during isometric force production tasks occur due to the inability of musculature to generate purely constant submaximal forces and are considered to be an estimation of neuromuscular noise. The human sensori-motor system regulates complex interactions between multiple afferent and efferent systems, which results in variability during functional task performance. Since muscles are the only active component of the motor system, it therefore seems reasonable that neuromuscular noise plays a key role in governing variability during both standing and walking. Seventy elderly women (including 34 fallers) performed multiple repetitions of isometric force production, quiet standing and walking tasks. No relationship between neuromuscular noise and functional task performance was observed in either the faller or the non-faller cohorts. When classified into groups with either nominal (group NOM, 25(th) -75(th) percentile) or extreme (either too high or too low, group EXT) levels of neuromuscular noise, group NOM demonstrated a clear association (r(2)>0.23, p<0.05) between neuromuscular noise and variability during task performance. On the other hand, group EXT demonstrated no such relationship, but also tended to walk slower, and had lower stride lengths, as well as lower isometric strength. These results suggest that neuromuscular noise is related to the quality of both static and dynamic functional task performance, but also that extreme levels of neuromuscular noise constitute a key neuromuscular deficit in the elderly.
format	article
author	Navrag B Singh Niklas König Adamantios Arampatzis Markus O Heller William R Taylor
author_facet	Navrag B Singh Niklas König Adamantios Arampatzis Markus O Heller William R Taylor
author_sort	Navrag B Singh
title	Extreme levels of noise constitute a key neuromuscular deficit in the elderly.
title_short	Extreme levels of noise constitute a key neuromuscular deficit in the elderly.
title_full	Extreme levels of noise constitute a key neuromuscular deficit in the elderly.
title_fullStr	Extreme levels of noise constitute a key neuromuscular deficit in the elderly.
title_full_unstemmed	Extreme levels of noise constitute a key neuromuscular deficit in the elderly.
title_sort	extreme levels of noise constitute a key neuromuscular deficit in the elderly.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/ddd2cdf57f1942c6ad8bf47fb0e0271f
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Extreme levels of noise constitute a key neuromuscular deficit in the elderly.

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