EMG artifacts removal during electrical stimulation, a CWT based technique

A technique of artifacts removal based on the continuous wavelet transform is presented. It uses common mother wavelets to find the temporal localization of stimulation artifacts on electromyogram (EMG) signal during an electrically evoked contraction of a muscle. This method can be used with standard stimulation pulse waveforms like monophasics or biphasics ones. It uses a histogram representation to find the best threshold to apply on the CWT domain. The algotithm is presented with Haar wavelet and then it is used with common wavelet famillies such as Daubechies or Symlets.

[1]  J. A. Freeman.  An electronic stimulus artifact suppressor. , 1971, Electroencephalography and Clinical Neurophysiology.

[2]  Derek T O'Keeffe,et al.  Stimulus artifact removal using a software-based two-stage peak detection algorithm , 2001, Journal of Neuroscience Methods.

[3]  R J Roby,et al.  A simplified circuit for stimulus artifact suppression. , 1975, Electroencephalography and clinical neurophysiology.

[4]  Jean Serra,et al.  Image Analysis and Mathematical Morphology , 1983 .

[5]  B. Widrow,et al.  On the Nature and Elimination of Stimulus Artifact in Nerve Signals Evoked and Recorded Using Surface Electrodes , 1982, IEEE Transactions on Biomedical Engineering.

[6]  G W Harding,et al.  A method for eliminating the stimulus artifact from digital recordings of the direct cortical response. , 1991, Computers and biomedical research, an international journal.

[7]  Toufik Bakir,et al.  Estimation of Muscular Fatigue Under Electromyostimulation Using CWT , 2012, IEEE Transactions on Biomedical Engineering.

[8]  R. Merletti,et al.  Suppression of stimulation artifacts from myoelectric-evoked potential recordings , 1988, IEEE Transactions on Biomedical Engineering.

[9]  Toufik Bakir,et al.  A real time electromyostimulator linked with EMG analysis device , 2013 .

[10]  R. D'ambrosia,et al.  A technique for recording the EMG of electrically stimulated skeletal muscle. , 1985, Orthopedics.