Age-related modifications to the magnitude and periodicity of neuromuscular noise.

<h4>Background</h4>Evaluation of task related outcomes within geriatric and fall-prone populations is essential not only for identification of neuromuscular deficits, but also for effective implementation of fall prevention strategies. As most tasks and activities of daily living are per...

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Autores principales:	Navrag B Singh, Niklas König, Adamantios Arampatzis, William R Taylor
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d8f2fe2c52eb4bd483a9d3cb0e5c2e24
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spelling	oai:doaj.org-article:d8f2fe2c52eb4bd483a9d3cb0e5c2e242021-11-18T08:42:12ZAge-related modifications to the magnitude and periodicity of neuromuscular noise.1932-620310.1371/journal.pone.0082791https://doaj.org/article/d8f2fe2c52eb4bd483a9d3cb0e5c2e242013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24349362/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Evaluation of task related outcomes within geriatric and fall-prone populations is essential not only for identification of neuromuscular deficits, but also for effective implementation of fall prevention strategies. As most tasks and activities of daily living are performed at submaximal force levels, restoration of muscle strength often does not produce the expected benefit in functional capacity. However, it is known that muscular control plays a key role in the performance of functional tasks, but it remains unclear to what degree muscular control and the associated neuromuscular noise (NmN) is age-related, particularly in the lower-extremities.<h4>Objectives</h4>The aim of this study was to determine the effects of age and fall-pathology on the magnitude as well as the frequency of NmN during lower extremity force production.<h4>Methods</h4>Sixteen young healthy adults, as well as seventy elderly women (36 healthy, 34 elderly fallers), performed force production tests at moderate levels (15% of maximum voluntary isometric contractions).<h4>Results</h4>Elderly fallers exhibited the highest magnitude of NmN, while the highest frequency components of NmN tended to occur in the healthy elderly. Young subjects exhibited significantly more power in the low frequency ranges than either of the elderly groups, and had the lowest levels of NmN.<h4>Conclusion</h4>These data suggest increased degeneration of muscular control through greater NmN in elderly fallers compared to healthy elderly or young subjects. This could possibly be associated with muscle atrophy and lower levels of motor unit synchronisation.Navrag B SinghNiklas KönigAdamantios ArampatzisWilliam R TaylorPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 12, p e82791 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Navrag B Singh Niklas König Adamantios Arampatzis William R Taylor Age-related modifications to the magnitude and periodicity of neuromuscular noise.
description	<h4>Background</h4>Evaluation of task related outcomes within geriatric and fall-prone populations is essential not only for identification of neuromuscular deficits, but also for effective implementation of fall prevention strategies. As most tasks and activities of daily living are performed at submaximal force levels, restoration of muscle strength often does not produce the expected benefit in functional capacity. However, it is known that muscular control plays a key role in the performance of functional tasks, but it remains unclear to what degree muscular control and the associated neuromuscular noise (NmN) is age-related, particularly in the lower-extremities.<h4>Objectives</h4>The aim of this study was to determine the effects of age and fall-pathology on the magnitude as well as the frequency of NmN during lower extremity force production.<h4>Methods</h4>Sixteen young healthy adults, as well as seventy elderly women (36 healthy, 34 elderly fallers), performed force production tests at moderate levels (15% of maximum voluntary isometric contractions).<h4>Results</h4>Elderly fallers exhibited the highest magnitude of NmN, while the highest frequency components of NmN tended to occur in the healthy elderly. Young subjects exhibited significantly more power in the low frequency ranges than either of the elderly groups, and had the lowest levels of NmN.<h4>Conclusion</h4>These data suggest increased degeneration of muscular control through greater NmN in elderly fallers compared to healthy elderly or young subjects. This could possibly be associated with muscle atrophy and lower levels of motor unit synchronisation.
format	article
author	Navrag B Singh Niklas König Adamantios Arampatzis William R Taylor
author_facet	Navrag B Singh Niklas König Adamantios Arampatzis William R Taylor
author_sort	Navrag B Singh
title	Age-related modifications to the magnitude and periodicity of neuromuscular noise.
title_short	Age-related modifications to the magnitude and periodicity of neuromuscular noise.
title_full	Age-related modifications to the magnitude and periodicity of neuromuscular noise.
title_fullStr	Age-related modifications to the magnitude and periodicity of neuromuscular noise.
title_full_unstemmed	Age-related modifications to the magnitude and periodicity of neuromuscular noise.
title_sort	age-related modifications to the magnitude and periodicity of neuromuscular noise.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/d8f2fe2c52eb4bd483a9d3cb0e5c2e24
work_keys_str_mv	AT navragbsingh agerelatedmodificationstothemagnitudeandperiodicityofneuromuscularnoise AT niklaskonig agerelatedmodificationstothemagnitudeandperiodicityofneuromuscularnoise AT adamantiosarampatzis agerelatedmodificationstothemagnitudeandperiodicityofneuromuscularnoise AT williamrtaylor agerelatedmodificationstothemagnitudeandperiodicityofneuromuscularnoise
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Age-related modifications to the magnitude and periodicity of neuromuscular noise.

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