The correction of eye blink artefacts in the EEG: a comparison of two prominent methods.

PloS One
Sven Hoffmann, Michael Falkenstein

Abstract

The study investigated the residual impact of eyeblinks on the electroencephalogram (EEG) after application of different correction procedures, namely a regression method (eye movement correction procedure, EMCP) and a component based method (Independent Component Analysis, ICA). Real and simulated data were investigated with respect to blink-related potentials and the residual mutual information of uncorrected vertical electrooculogram (EOG) and corrected EEG, which is a measure of residual EOG contribution to the EEG. The results reveal an occipital positivity that peaks at about 250 ms after the maximum blink excursion following application of either correction procedure. This positivity was not observable in the simulated data. Mutual information of vertical EOG and EEG depended on the applied regression procedure. In addition, different correction results were obtained for real and simulated data. ICA yielded almost perfect correction in all conditions. However, under certain conditions EMCP yielded comparable results to the ICA approach. In conclusion, for EMCP the quality of correction depended on the EMCP variant used and the structure of the data, whereas ICA always yielded almost perfect correction. However, its disad...Continue Reading

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Citations

Feb 28, 2013·Brain Structure & Function·Sven HoffmannChristian Beste
Oct 23, 2013·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Edmund WascherSven Hoffmann
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Methods Mentioned

BETA
PCA

Software Mentioned

Matlab
EMCP
EEGLAB
Infomax
Brain Vision Analyser
Vision Analyzer

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