Article (Scientific journals)
Graph Theoretical Analysis of Cortical Networks based on Conscious Experience.
Lee, Minji; Baird, Benjamin; Gosseries, Olivia et al.
2019In Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2019, p. 3373-3376
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Keywords :
Brain/physiology; Consciousness; Electroencephalography; Humans; Sleep, REM; Wakefulness
Abstract :
[en] The aim of the study was to investigate differences in cortical networks based on the state of consciousness. Five subjects performed a serial-awakening paradigm with electroencephalography (EEG) recordings. We considered four states of consciousness: (1) non-rapid eye movement (NREM) sleep with no conscious experience, (2) NREM sleep with conscious experience, (3) rapid eye movement (REM) sleep with conscious experience, and (4) wakefulness. We applied graph theoretical analysis to explore the cortical connectivity and network properties in five frequency bands. Connectivity between EEG channels was evaluated with the weighted phase lag index (wPLI). The characteristic path length, transitivity, and clustering coefficient were computed to evaluate functional integration and segregation of the associated brain network. There were no significant differences in wPLI among the four states of consciousness. In the beta band, functional integration in wakefulness was higher than in NREM sleep. Regarding functional segregation, in the theta band, transitivity and clustering coefficient in NREM sleep with no conscious experience were stronger than in wakefulness or REM sleep, but clustering in the beta band showed an opposite effect. The observed differences may be related to cortical bistability and add to previously observed neural correlates of consciousness.
Disciplines :
Neurosciences & behavior
Author, co-author :
Lee, Minji
Baird, Benjamin
Gosseries, Olivia  ;  Université de Liège - ULiège > Unités de recherche interfacultaires > GIGA : Coma Group
Nieminen, Jaakko O
Boly, Mélanie ;  Université de Liège - ULiège > Département des sciences cliniques > Neurologie
Tononi, Giulio
Lee, Seong-Whan
Language :
English
Title :
Graph Theoretical Analysis of Cortical Networks based on Conscious Experience.
Publication date :
July 2019
Journal title :
Annual International Conference of the IEEE Engineering in Medicine and Biology Society
ISSN :
2375-7477
eISSN :
2694-0604
Volume :
2019
Pages :
3373-3376
Peer reviewed :
Peer reviewed
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since 06 August 2023

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