Using structural connectivity to augment community structure in EEG functional connectivity.

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Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_79AAE9EE33AC
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Using structural connectivity to augment community structure in EEG functional connectivity.
Journal
Network neuroscience
Author(s)
Glomb K., Mullier E., Carboni M., Rubega M., Iannotti G., Tourbier S., Seeber M., Vulliemoz S., Hagmann P.
ISSN
2472-1751 (Electronic)
ISSN-L
2472-1751
Publication state
Published
Issued date
2020
Peer-reviewed
Oui
Volume
4
Number
3
Pages
761-787
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
Recently, EEG recording techniques and source analysis have improved, making it feasible to tap into fast network dynamics. Yet, analyzing whole-cortex EEG signals in source space is not standard, partly because EEG suffers from volume conduction: Functional connectivity (FC) reflecting genuine functional relationships is impossible to disentangle from spurious FC introduced by volume conduction. Here, we investigate the relationship between white matter structural connectivity (SC) and large-scale network structure encoded in EEG-FC. We start by confirming that FC (power envelope correlations) is predicted by SC beyond the impact of Euclidean distance, in line with the assumption that SC mediates genuine FC. We then use information from white matter structural connectivity in order to smooth the EEG signal in the space spanned by graphs derived from SC. Thereby, FC between nearby, structurally connected brain regions increases while FC between nonconnected regions remains unchanged, resulting in an increase in genuine, SC-mediated FC. We analyze the induced changes in FC, assessing the resemblance between EEG-FC and volume-conduction- free fMRI-FC, and find that smoothing increases resemblance in terms of overall correlation and community structure. This result suggests that our method boosts genuine FC, an outcome that is of interest for many EEG network neuroscience questions.
Keywords
Brain connectivity, EEG, Resting state, Structure-function-relationship
Pubmed
Web of science
Open Access
Yes
Create date
14/09/2020 12:17
Last modification date
30/04/2021 6:11
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