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Affiliation
Universitè de technologie de TroyesLebanese University
Universite Paris I – Pantheon-Sorbonne
Renault Group
Issue Date
2005-02-28Subjects
electromyography
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The purpose of this study was to develop an automatic segmentation method in order to identify postural surface EMG segments in long-duration recordings. Surface EMG signals were collected from the cervical erector spinae (CES), erector spinae (ES), external oblique (EO), and tibialis anterior (TA) muscles of 11 subjects using a bipolar electrode configuration. Subjects remained seated in a car seat over the 150-min data-collection period. The modified dynamic cumulative sum (MDCS) algorithm was used to automatically segment the surface EMG signals. Signals were rejected by comparison with an exponential mathematical model of the spectrum of a surface EMG signal. The average power ratio computed between two successive retained segments was used to classify segments as postural or surface EMG. The presence of a negative slope of a regression line fitted to the median frequency values of postural surface EMG segments was taken as an indication of fatigue. Alpha level was set at 0.05. The overall classification error rate was 8%, and could be performed in 25 min for a 150-min signal using a custom-built software program written in C (Borland Software Corporation, CA, USA). This error rate could be enhanced by concentrating on the rejection method, which caused most of the misclassification (6%). Furthermore, the elimination of non-postural surface EMG segments by the use of a segmentation approach enabled muscular fatigue to be identified in signals that contained no evidence of fatigue when analysed using traditional methods.Citation
El Falou W, Duchene J, Hewson D, Khalil M, Grabisch M, Lino F (2005) 'A segmentation approach to long duration surface EMG recordings', Journal of Electromyography and Kinesiology, 15 (1), pp.111-119.Publisher
ElsevierAdditional Links
https://www.sciencedirect.com/science/article/pii/S1050641104000744Type
ArticleLanguage
enISSN
1050-6411ae974a485f413a2113503eed53cd6c53
10.1016/j.jelekin.2004.07.004