A comparison of computer-based methods for the determination of onset of muscle contraction using electromyography

Hodges, P. W. and Bui, B. H. (1996) A comparison of computer-based methods for the determination of onset of muscle contraction using electromyography. Electromyography And Motor Control-electroencephalography And Clinical Neurophysiology, 101 6: 511-519.


Author Hodges, P. W.
Bui, B. H.
Title A comparison of computer-based methods for the determination of onset of muscle contraction using electromyography
Journal name Electromyography And Motor Control-electroencephalography And Clinical Neurophysiology
Publication date 1996
Sub-type Article
DOI 10.1016/S0921-884X(96)95190-5
Volume number 101
Issue number 6
ISSN 0924-980X
Start page 511
End page 519
Total pages 9
Place of publication Shannon, Ireland :
Publisher Elsevier Scientific Publishers Ireland
Language eng
Subject 11 Medical and Health Sciences
Abstract Little consensus exists in the literature regarding methods for determination of the onset of electromyographic (EMG) activity. The aim of this study was to compare the relative accuracy of a range of computer-based techniques with respect to EMG onset determined visually by an experienced examiner. Twenty-seven methods were compared which varied in terms of EMG processing (low pass filtering at 10, 50 and 500 Hz), threshold value (1, 2 and 3 SD beyond mean of baseline activity) and the number of samples for which the mean must exceed the defined threshold (20, 50 and 100 ms). Three hundred randomly selected trials of a postural task were evaluated using each technique. The visual determination of EMG onset was found to be highly repeatable between days. Linear regression equations were calculated for the values selected by each computer method which indicated that the onset values selected by the majority of the parameter combinations deviated significantly from the visually derived onset values. Several methods accurately selected the time of onset of EMG activity and are recommended for future use. Copyright (C) 1996 Elsevier Science Ireland Ltd.
Keyword Engineering, Biomedical
Neurosciences
Electromyogram (emg)
Onset
Timing
Processing
Analysis
Rapid Arm Movements
Postural Adjustments
Parkinsons-disease
Voluntary Movement
Emg
Perturbations
Organization
Walking
Flexion
Biomechanics
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article
Collection: School of Health and Rehabilitation Sciences Publications
 
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