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Can activities of daily living contribute to EMG normalization for gait analysis?

This study aims to examine alternative methods of normalization that effectively reflect muscle activity as compared to Maximal Voluntary Contraction (MVC). EMG data recorded from knee flexion-extension muscles in 10 control subjects during the stance phase of the gait cycle were examined by adoptin...

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Detalles Bibliográficos
Autores principales: Ghazwan, Aseel, Forrest, Sarah M., Holt, Cathy A., Whatling, Gemma M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5378339/
https://www.ncbi.nlm.nih.gov/pubmed/28369104
http://dx.doi.org/10.1371/journal.pone.0174670
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author Ghazwan, Aseel
Forrest, Sarah M.
Holt, Cathy A.
Whatling, Gemma M.
author_facet Ghazwan, Aseel
Forrest, Sarah M.
Holt, Cathy A.
Whatling, Gemma M.
author_sort Ghazwan, Aseel
collection PubMed
description This study aims to examine alternative methods of normalization that effectively reflect muscle activity as compared to Maximal Voluntary Contraction (MVC). EMG data recorded from knee flexion-extension muscles in 10 control subjects during the stance phase of the gait cycle were examined by adopting different approaches of normalization: MVC, Mean and Peak Dynamic during gait cycles, (MDM and PDM, respectively), Peak Dynamic during activities of daily living (ADLs), (*PDM), and a combination of ADLs and MVC(**PDM). Intra- and inter-individual variability were calculated to determine reliability and similarity to MCV. **PDM showed excellent reliability across subjects in comparison to MVC, where variance ratio ranged from 0.43–0.99 for **PDM and 0.79–1.08 for MVC. Coefficient of variability showed a similar trend to Variance Ratio, ranging from 0.60–1.25 for **PDM and 1.97–3.92 for MVC. Both MVC and **PDM, and to some extent *PDM, demonstrated good-to-excellent relative amplitude’s matching; i.e. root mean square difference and absolute difference were both around 0.08 for Vastus medialis to about 4 for Medial gastrocnemius. It was concluded that **PDM and *PDM were reliable, **PDM mirrored MVC and thus could be used as an alternative to MVC for subjects who are unable to provide the required effort for MVC testing. Where MVC testing is not possible, *PDM is the next preferred option.
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spelling pubmed-53783392017-04-07 Can activities of daily living contribute to EMG normalization for gait analysis? Ghazwan, Aseel Forrest, Sarah M. Holt, Cathy A. Whatling, Gemma M. PLoS One Research Article This study aims to examine alternative methods of normalization that effectively reflect muscle activity as compared to Maximal Voluntary Contraction (MVC). EMG data recorded from knee flexion-extension muscles in 10 control subjects during the stance phase of the gait cycle were examined by adopting different approaches of normalization: MVC, Mean and Peak Dynamic during gait cycles, (MDM and PDM, respectively), Peak Dynamic during activities of daily living (ADLs), (*PDM), and a combination of ADLs and MVC(**PDM). Intra- and inter-individual variability were calculated to determine reliability and similarity to MCV. **PDM showed excellent reliability across subjects in comparison to MVC, where variance ratio ranged from 0.43–0.99 for **PDM and 0.79–1.08 for MVC. Coefficient of variability showed a similar trend to Variance Ratio, ranging from 0.60–1.25 for **PDM and 1.97–3.92 for MVC. Both MVC and **PDM, and to some extent *PDM, demonstrated good-to-excellent relative amplitude’s matching; i.e. root mean square difference and absolute difference were both around 0.08 for Vastus medialis to about 4 for Medial gastrocnemius. It was concluded that **PDM and *PDM were reliable, **PDM mirrored MVC and thus could be used as an alternative to MVC for subjects who are unable to provide the required effort for MVC testing. Where MVC testing is not possible, *PDM is the next preferred option. Public Library of Science 2017-04-03 /pmc/articles/PMC5378339/ /pubmed/28369104 http://dx.doi.org/10.1371/journal.pone.0174670 Text en © 2017 Ghazwan et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Ghazwan, Aseel
Forrest, Sarah M.
Holt, Cathy A.
Whatling, Gemma M.
Can activities of daily living contribute to EMG normalization for gait analysis?
title Can activities of daily living contribute to EMG normalization for gait analysis?
title_full Can activities of daily living contribute to EMG normalization for gait analysis?
title_fullStr Can activities of daily living contribute to EMG normalization for gait analysis?
title_full_unstemmed Can activities of daily living contribute to EMG normalization for gait analysis?
title_short Can activities of daily living contribute to EMG normalization for gait analysis?
title_sort can activities of daily living contribute to emg normalization for gait analysis?
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5378339/
https://www.ncbi.nlm.nih.gov/pubmed/28369104
http://dx.doi.org/10.1371/journal.pone.0174670
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