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Mechanomyography versus Electromyography, in monitoring the muscular fatigue

Authors
  • Tarata, Mihai T1, 2
  • 1 University of Medicine and Pharmacy of Craiova, Department of Medical Informatics, Bul. Antonescu 62, Craiova, Romania , Craiova
  • 2 Iowa State University, 178S Forker Bldg., Health & Human Performance Dept, Ames, Iowa, IA-50011, USA , Ames
Type
Published Article
Journal
BioMedical Engineering OnLine
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Feb 11, 2003
Volume
2
Issue
1
Identifiers
DOI: 10.1186/1475-925X-2-3
Source
Springer Nature
Keywords
License
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Abstract

BackgroundThe use of the mechanomyogram (MMG) which detects muscular vibrations generated by fused individual fiber twitches has been refined. The study addresses a comparison of the MMG and surface electromyogram (SEMG) in monitoring muscle fatigue.MethodsThe SEMG and MMG were recorded simultaneously from the same territory of motor units in two muscles (Biceps, Brachioradialis) of the human (n = 18), during sustained contraction at 25 % MVC (maximal voluntary contraction).ResultsThe RMS (root mean square) of the SEMG and MMG increased with advancing fatigue; MF (median frequency) of the PSD (power density spectra) progressively decreased from the onset of the contraction. These findings (both muscles, all subjects), demonstrate both through the SEMG and MMG a central component of the fatigue. The MF regression slopes of MMG were closer to each other between men and women (Biceps 1.55%; Brachialis 13.2%) than were the SEMG MF slopes (Biceps 25.32%; Brachialis 17.72%), which shows a smaller inter-sex variability for the MMG vs. SEMG.ConclusionThe study presents another quantitative comparison (MF, RMS) of MMG and SEMG, showing that MMG signal can be used for indication of the degree of muscle activation and for monitoring the muscle fatigue when the application of SEMG is not feasible (chronical implants, adverse environments contaminated by electrical noise).

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