Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force
PURPOSE: This study aimed: i) to examine the relationship between the magnitude of cross-talk in mechanomyographic (MMG) signals generated by the extensor digitorum (ED), extensor carpi ulnaris (ECU), and flexor carpi ulnaris (FCU) muscles with the sub-maximal to maximal isometric grip force, and wi...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4011864/ https://www.ncbi.nlm.nih.gov/pubmed/24802858 http://dx.doi.org/10.1371/journal.pone.0096628 |
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author | Islam, Md. Anamul Sundaraj, Kenneth Ahmad, R. Badlishah Sundaraj, Sebastian Ahamed, Nizam Uddin Ali, Md. Asraf |
author_facet | Islam, Md. Anamul Sundaraj, Kenneth Ahmad, R. Badlishah Sundaraj, Sebastian Ahamed, Nizam Uddin Ali, Md. Asraf |
author_sort | Islam, Md. Anamul |
collection | PubMed |
description | PURPOSE: This study aimed: i) to examine the relationship between the magnitude of cross-talk in mechanomyographic (MMG) signals generated by the extensor digitorum (ED), extensor carpi ulnaris (ECU), and flexor carpi ulnaris (FCU) muscles with the sub-maximal to maximal isometric grip force, and with the anthropometric parameters of the forearm, and ii) to quantify the distribution of the cross-talk in the MMG signal to determine if it appears due to the signal component of intramuscular pressure waves produced by the muscle fibers geometrical changes or due to the limb tremor. METHODS: Twenty, right-handed healthy men (mean ± SD: age = 26.7±3.83 y; height = 174.47±6.3 cm; mass = 72.79±14.36 kg) performed isometric muscle actions in 20% increment from 20% to 100% of the maximum voluntary isometric contraction (MVIC). During each muscle action, MMG signals generated by each muscle were detected using three separate accelerometers. The peak cross-correlations were used to quantify the cross-talk between two muscles. RESULTS: The magnitude of cross-talk in the MMG signals among the muscle groups ranged from, R(2)(x, y) = 2.45–62.28%. Linear regression analysis showed that the magnitude of cross-talk increased linearly (r(2) = 0.857–0.90) with the levels of grip force for all the muscle groups. The amount of cross-talk showed weak positive and negative correlations (r(2) = 0.016–0.216) with the circumference and length of the forearm respectively, between the muscles at 100% MVIC. The cross-talk values significantly differed among the MMG signals due to: limb tremor (MMG(TF)), slow firing motor unit fibers (MMG(SF)) and fast firing motor unit fibers (MMG(FF)) between the muscles at 100% MVIC (p<0.05, η (2) = 0.47–0.80). SIGNIFICANCE: The results of this study may be used to improve our understanding of the mechanics of the forearm muscles during different levels of the grip force. |
format | Online Article Text |
id | pubmed-4011864 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-40118642014-05-09 Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force Islam, Md. Anamul Sundaraj, Kenneth Ahmad, R. Badlishah Sundaraj, Sebastian Ahamed, Nizam Uddin Ali, Md. Asraf PLoS One Research Article PURPOSE: This study aimed: i) to examine the relationship between the magnitude of cross-talk in mechanomyographic (MMG) signals generated by the extensor digitorum (ED), extensor carpi ulnaris (ECU), and flexor carpi ulnaris (FCU) muscles with the sub-maximal to maximal isometric grip force, and with the anthropometric parameters of the forearm, and ii) to quantify the distribution of the cross-talk in the MMG signal to determine if it appears due to the signal component of intramuscular pressure waves produced by the muscle fibers geometrical changes or due to the limb tremor. METHODS: Twenty, right-handed healthy men (mean ± SD: age = 26.7±3.83 y; height = 174.47±6.3 cm; mass = 72.79±14.36 kg) performed isometric muscle actions in 20% increment from 20% to 100% of the maximum voluntary isometric contraction (MVIC). During each muscle action, MMG signals generated by each muscle were detected using three separate accelerometers. The peak cross-correlations were used to quantify the cross-talk between two muscles. RESULTS: The magnitude of cross-talk in the MMG signals among the muscle groups ranged from, R(2)(x, y) = 2.45–62.28%. Linear regression analysis showed that the magnitude of cross-talk increased linearly (r(2) = 0.857–0.90) with the levels of grip force for all the muscle groups. The amount of cross-talk showed weak positive and negative correlations (r(2) = 0.016–0.216) with the circumference and length of the forearm respectively, between the muscles at 100% MVIC. The cross-talk values significantly differed among the MMG signals due to: limb tremor (MMG(TF)), slow firing motor unit fibers (MMG(SF)) and fast firing motor unit fibers (MMG(FF)) between the muscles at 100% MVIC (p<0.05, η (2) = 0.47–0.80). SIGNIFICANCE: The results of this study may be used to improve our understanding of the mechanics of the forearm muscles during different levels of the grip force. Public Library of Science 2014-05-06 /pmc/articles/PMC4011864/ /pubmed/24802858 http://dx.doi.org/10.1371/journal.pone.0096628 Text en © 2014 Islam 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, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Islam, Md. Anamul Sundaraj, Kenneth Ahmad, R. Badlishah Sundaraj, Sebastian Ahamed, Nizam Uddin Ali, Md. Asraf Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force |
title | Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force |
title_full | Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force |
title_fullStr | Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force |
title_full_unstemmed | Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force |
title_short | Cross-Talk in Mechanomyographic Signals from the Forearm Muscles during Sub-Maximal to Maximal Isometric Grip Force |
title_sort | cross-talk in mechanomyographic signals from the forearm muscles during sub-maximal to maximal isometric grip force |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4011864/ https://www.ncbi.nlm.nih.gov/pubmed/24802858 http://dx.doi.org/10.1371/journal.pone.0096628 |
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