Sharp edge artifacts and spurious coupling in EEG frequency comodulation measures

Recent electroencephalogram (EEG), electrocorticogram (ECoG), and local field potential (LFP) observations suggest that distinct frequency bands interact. Numerous measures have been proposed to analyze such interactions, including the amplitude envelope modulation of high frequency activity by the...

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Bibliographic Details
Published inJournal of neuroscience methods Vol. 170; no. 2; pp. 352 - 357
Main Authors Kramer, Mark A., Tort, Adriano B.L., Kopell, Nancy J.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 30.05.2008
Subjects
Alpha Rhythm
Computer Simulation
Data Interpretation, Statistical
Electroencephalography - statistics & numerical data
Electrophysiology
Evoked Potentials - physiology
Frequency comodulation
Gamma
Hilbert transform
Nesting
Software
Theta
Theta Rhythm
Nesting
Gamma
Hilbert transform
Frequency comodulation
Theta
Online AccessGet full text
ISSN0165-0270
1872-678X
DOI10.1016/j.jneumeth.2008.01.020

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Summary:Recent electroencephalogram (EEG), electrocorticogram (ECoG), and local field potential (LFP) observations suggest that distinct frequency bands interact. Numerous measures have been proposed to analyze such interactions, including the amplitude envelope modulation of high frequency activity by the phase or signal of low frequency activity. In this short communication, we describe how abrupt increases or decreases in voltage data may produce spurious coupling in these measures and suggest techniques to detect these effects.
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ISSN:0165-0270
1872-678X
DOI:10.1016/j.jneumeth.2008.01.020