Relationship between Isometric Muscle Force and Fractal Dimension of Surface Electromyogram
The relationship between fractal dimension of the surface electromyogram (sEMG) and the intensity of muscle contraction is still controversial in simulated and experimental conditions. To support the use of fractal analysis to investigate myoelectric fatigue, it is crucial to establish the interdepe...
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Online Access: | http://dx.doi.org/10.1155/2018/5373846 |
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doaj-9782c02e208d407b816c6a97722ae2602020-11-24T22:38:01ZengHindawi LimitedBioMed Research International2314-61332314-61412018-01-01201810.1155/2018/53738465373846Relationship between Isometric Muscle Force and Fractal Dimension of Surface ElectromyogramMatteo Beretta-Piccoli0Gennaro Boccia1Tessa Ponti2Ron Clijsen3Marco Barbero4Corrado Cescon5Rehabilitation Research Laboratory 2rLab, Department of Business Economics, Health and Social Care, University of Applied Sciences and Arts of Southern Switzerland, Manno, SwitzerlandNeuroMuscular Function Research Group, School of Exercise and Sport Sciences, Department of Medical Sciences, University of Turin, Turin, ItalyRehabilitation Research Laboratory 2rLab, Department of Business Economics, Health and Social Care, University of Applied Sciences and Arts of Southern Switzerland, Manno, SwitzerlandUniversity of Business Economics, Health and Social Care, University of Applied Sciences and Arts of Southern Switzerland, Landquart, SwitzerlandRehabilitation Research Laboratory 2rLab, Department of Business Economics, Health and Social Care, University of Applied Sciences and Arts of Southern Switzerland, Manno, SwitzerlandRehabilitation Research Laboratory 2rLab, Department of Business Economics, Health and Social Care, University of Applied Sciences and Arts of Southern Switzerland, Manno, SwitzerlandThe relationship between fractal dimension of the surface electromyogram (sEMG) and the intensity of muscle contraction is still controversial in simulated and experimental conditions. To support the use of fractal analysis to investigate myoelectric fatigue, it is crucial to establish the interdependence between fractal dimension and muscle contraction intensity. We analyzed the behavior of fractal dimension, conduction velocity, mean frequency, and average rectified value in twenty-eight volunteers at nine levels of isometric force. sEMG was obtained using bidimensional arrays in the biceps brachii muscle. The values of fractal dimension and mean frequency increased with force unless a plateau was reached at 30% maximal voluntary contraction. Overall, our findings suggest that, above a certain level of force, the use of fractal dimension to evaluate the myoelectric manifestations of fatigue may be considered, regardless of muscle contraction intensity.http://dx.doi.org/10.1155/2018/5373846 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Matteo Beretta-Piccoli Gennaro Boccia Tessa Ponti Ron Clijsen Marco Barbero Corrado Cescon |
spellingShingle |
Matteo Beretta-Piccoli Gennaro Boccia Tessa Ponti Ron Clijsen Marco Barbero Corrado Cescon Relationship between Isometric Muscle Force and Fractal Dimension of Surface Electromyogram BioMed Research International |
author_facet |
Matteo Beretta-Piccoli Gennaro Boccia Tessa Ponti Ron Clijsen Marco Barbero Corrado Cescon |
author_sort |
Matteo Beretta-Piccoli |
title |
Relationship between Isometric Muscle Force and Fractal Dimension of Surface Electromyogram |
title_short |
Relationship between Isometric Muscle Force and Fractal Dimension of Surface Electromyogram |
title_full |
Relationship between Isometric Muscle Force and Fractal Dimension of Surface Electromyogram |
title_fullStr |
Relationship between Isometric Muscle Force and Fractal Dimension of Surface Electromyogram |
title_full_unstemmed |
Relationship between Isometric Muscle Force and Fractal Dimension of Surface Electromyogram |
title_sort |
relationship between isometric muscle force and fractal dimension of surface electromyogram |
publisher |
Hindawi Limited |
series |
BioMed Research International |
issn |
2314-6133 2314-6141 |
publishDate |
2018-01-01 |
description |
The relationship between fractal dimension of the surface electromyogram (sEMG) and the intensity of muscle contraction is still controversial in simulated and experimental conditions. To support the use of fractal analysis to investigate myoelectric fatigue, it is crucial to establish the interdependence between fractal dimension and muscle contraction intensity. We analyzed the behavior of fractal dimension, conduction velocity, mean frequency, and average rectified value in twenty-eight volunteers at nine levels of isometric force. sEMG was obtained using bidimensional arrays in the biceps brachii muscle. The values of fractal dimension and mean frequency increased with force unless a plateau was reached at 30% maximal voluntary contraction. Overall, our findings suggest that, above a certain level of force, the use of fractal dimension to evaluate the myoelectric manifestations of fatigue may be considered, regardless of muscle contraction intensity. |
url |
http://dx.doi.org/10.1155/2018/5373846 |
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