Abstract
Cross-frequency coupling (CFC) between neuronal oscillations reflects an integration of spatially and spectrally distributed information in the brain. Here, we propose a novel framework for detecting such interactions in Magneto- and Electroencephalography (MEG/EEG), which we refer to as Nonlinear Interaction Decomposition (NID). In contrast to all previous methods for separation of cross-frequency (CF) sources in the brain, we propose that the extraction of nonlinearly interacting oscillations can be based on the statistical properties of their linear mixtures. The main idea of NID is that nonlinearly coupled brain oscillations can be mixed in such a way that the resulting linear mixture has a non-Gaussian distribution. We evaluate this argument analytically for amplitude-modulated narrow-band oscillations which are either phase-phase or amplitude-amplitude CF coupled. We validated NID extensively with simulated EEG obtained with realistic head modelling. The method extracted nonlinearly interacting components reliably even at SNRs as small as −15 dB. Additionally, we applied NID to the resting-state EEG of 81 subjects to characterize CF phase-phase coupling between alpha and beta oscillations. The extracted sources were located in temporal, parietal and frontal areas, demonstrating the existence of diverse local and distant nonlinear interactions in resting-state EEG data. All codes are available publicly via GitHub.
Original language | English |
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Article number | 116599 |
Journal | NeuroImage |
Volume | 211 |
DOIs | |
Publication status | Published - 2020 May 1 |
Bibliographical note
Funding Information:VVN was supported in part by the HSE Basic Research Program and the Russian Academic Excellence Project ‘5–100’. KRM was supported in part by the Institute for Information & Communications Technology Promotion and funded by the Korea government (MSIT) (No. 2017-0-00451 ), and was partly supported by the German Ministry for Education and Research (BMBF) under Grants 01IS14013A-E , 01GQ1115 , 01GQ0850 , 01IS18025A and 01IS18037A ; the German Research Foundation (DFG) under Grant Math+, EXC 2046/1, Project ID 390685689 . This research was partially funded by the German Research Foundation ( DFG, SFB936/Z3 and TRR169/C1/B4 ).
Funding Information:
VVN was supported in part by the HSE Basic Research Program and the Russian Academic Excellence Project ?5?100?. KRM was supported in part by the Institute for Information & Communications Technology Promotion and funded by the Korea government (MSIT) (No. 2017-0-00451), and was partly supported by the German Ministry for Education and Research (BMBF) under Grants 01IS14013A-E, 01GQ1115, 01GQ0850, 01IS18025A and 01IS18037A; the German Research Foundation (DFG) under Grant Math+, EXC 2046/1, Project ID 390685689.
Publisher Copyright:
© 2020 The Authors
Keywords
- Cross-frequency coupling
- EEG
- ICA
- Independent component analysis
- MEG
- NID
- Nonlinear interaction decomposition
- Nonlinear neuronal interactions
ASJC Scopus subject areas
- Neurology
- Cognitive Neuroscience