Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength

Introduction: We examined the power spectralchanges of the compound muscle action potential (M wave)evoked during isometric contractions of increasing strength.Methods: Surface electromyography (sEMG) of the vastus later-alis and medialis was recorded from 20 volunteers who per-formed 4-s step-wise...

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Autores: Rodríguez Falces, Javier, Place, Nicolas
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Universidad Pública de Navarra
Repositorio:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/55582
Acceso en línea:https://hdl.handle.net/2454/55582
Access Level:acceso abierto
Palabra clave:Superimposed M-wave
Surface EMG spectral analysis
Median frequency
Step-wise contractions
Femoral nerve stimulation
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spelling Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strengthRodríguez Falces, JavierPlace, NicolasSuperimposed M-waveSurface EMG spectral analysisMedian frequencyStep-wise contractionsFemoral nerve stimulationIntroduction: We examined the power spectralchanges of the compound muscle action potential (M wave)evoked during isometric contractions of increasing strength.Methods: Surface electromyography (sEMG) of the vastus later-alis and medialis was recorded from 20 volunteers who per-formed 4-s step-wise isometric contractions of differentintensities. A maximal M wave was elicited by a single stimulusto the femoral nerve and superimposed on the voluntary con-tractions. The spectral characteristics (Fmean and Fmedian) ofsEMG and M-wave signals were calculated. Results: M-wavespectral indicators increased systematically with contractionintensity up to 60% MVC and then leveled off at higher forces.Over the 10–60% MVC range, the increase in spectral indica-tors was 3 times higher for M waves (36%) than for sEMG(12%). Conclusions: The consistent increase in M-wave spectralcharacteristics with force is due to the fact that the number ofmotor units recruited by the superimposed supramaximal stimu-lus is approximately stable.WileyIngeniería Eléctrica y ElectrónicaIngeniaritza Elektrikoa eta Elektronikoa2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2454/55582reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2014 Wiley Periodicals, Inc. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified.info:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/555822026-06-17T12:41:47Z
dc.title.none.fl_str_mv Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
title Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
spellingShingle Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
Rodríguez Falces, Javier
Superimposed M-wave
Surface EMG spectral analysis
Median frequency
Step-wise contractions
Femoral nerve stimulation
title_short Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
title_full Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
title_fullStr Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
title_full_unstemmed Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
title_sort Power spectral changes of the superimposed M wave during isometric voluntary contractions of increasing strength
dc.creator.none.fl_str_mv Rodríguez Falces, Javier
Place, Nicolas
author Rodríguez Falces, Javier
author_facet Rodríguez Falces, Javier
Place, Nicolas
author_role author
author2 Place, Nicolas
author2_role author
dc.contributor.none.fl_str_mv Ingeniería Eléctrica y Electrónica
Ingeniaritza Elektrikoa eta Elektronikoa
dc.subject.none.fl_str_mv Superimposed M-wave
Surface EMG spectral analysis
Median frequency
Step-wise contractions
Femoral nerve stimulation
topic Superimposed M-wave
Surface EMG spectral analysis
Median frequency
Step-wise contractions
Femoral nerve stimulation
description Introduction: We examined the power spectralchanges of the compound muscle action potential (M wave)evoked during isometric contractions of increasing strength.Methods: Surface electromyography (sEMG) of the vastus later-alis and medialis was recorded from 20 volunteers who per-formed 4-s step-wise isometric contractions of differentintensities. A maximal M wave was elicited by a single stimulusto the femoral nerve and superimposed on the voluntary con-tractions. The spectral characteristics (Fmean and Fmedian) ofsEMG and M-wave signals were calculated. Results: M-wavespectral indicators increased systematically with contractionintensity up to 60% MVC and then leveled off at higher forces.Over the 10–60% MVC range, the increase in spectral indica-tors was 3 times higher for M waves (36%) than for sEMG(12%). Conclusions: The consistent increase in M-wave spectralcharacteristics with force is due to the fact that the number ofmotor units recruited by the superimposed supramaximal stimu-lus is approximately stable.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/55582
url https://hdl.handle.net/2454/55582
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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