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Multivariate cross-frequency coupling via generalized eigendecomposition

Michael X Cohen
doi: https://doi.org/10.1101/099184
Michael X Cohen
Radboud University and Radboud University Medical Center, Donders Center for Neuroscience
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Abstract

This paper presents a new framework for analyzing cross-frequency coupling in multichannel electrophysiological recordings. The generalized eigendecomposition-based cross-frequency coupling framework (gedCFC) is inspired by source separation algorithms combined with dynamics of mesoscopic neurophysiological processes. It is unaffected by factors that confound traditional CFC methods such as non-stationarities, non-sinusoidality, and non-uniform phase angle distributions—attractive properties considering that brain activity is neither stationary nor perfectly sinusoidal. The gedCFC framework opens new opportunities for conceptualizing CFC as network interactions with diverse spatial/topographical distributions. five specific methods within the gedCFC framework are detailed, with validations in simulated data and applications in several empirical datasets. gedCFC accurately recovers physiologically plausible CFC patterns embedded in noise where traditional CFC methods perform poorly. It is also demonstrated that spike-field coherence in multichannel local field potential data can be analyzed using the gedCFC framework, with significant advantages over traditional spike-field coherence analyses. Null-hypothesis testing is also discussed.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted January 09, 2017.
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Multivariate cross-frequency coupling via generalized eigendecomposition
Michael X Cohen
bioRxiv 099184; doi: https://doi.org/10.1101/099184
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Multivariate cross-frequency coupling via generalized eigendecomposition
Michael X Cohen
bioRxiv 099184; doi: https://doi.org/10.1101/099184

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