NDLI: The relationship between human cortico-muscular coherence and rectified EMG

Content Provider	IEEE Xplore Digital Library
Author	Myers, L.J. O'Malley, M.
Copyright Year	2003
Description	Author affiliation: Dept. of Electron. & Electr. Eng., Univ. Coll. Dublin, Ireland (Myers, L.J.; O'Malley, M.)
Abstract	Rectification of the electromyographic (EMG) signal is a commonly used pre-processing procedure that allows detection of significant coherence between EMG and measured cortical signals. It has been demonstrated that rectification enhances mean group firing rates. This paper develops an efficient algorithm that may be used to extract these relevant frequencies. This method assumes the EMG to be a realization of a randomly distributed stationary process. Therefore the 'true' power spectrum of this process will not contain specific timing information. However the power spectrum of the actual rectified EMG does contain timing information which is detectable at frequencies where it exceeds the analytic power spectrum. Coherence of measured electroencephalographic (EEG) signals and rectified EMG show that significant coherence peaks occur at the same frequencies obtained using the algorithm. Cortical drive appears to synchronize motor unit firings to particular frequencies that may be extracted from the rectified EMG alone. These frequencies are not easily obtained from either the EEG or the non-rectified EMG.
Starting Page	289
Ending Page	292
File Size	393352
Page Count	4
File Format	PDF
ISBN	0780375793
DOI	10.1109/CNE.2003.1196817
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-03-20
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Humans Electric variables measurement Frequency Synchronous motors Educational institutions Electromyography Electroencephalography Timing Autocorrelation Data mining
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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