Hypnosis; non-ordinary state of consciousness; frontoparietal and midline connectivity; graph theory; electroencephalography
Résumé :
[en] Hypnosis has been shown to be of clinical utility; however, its underlying neural mechanisms remain unclear. This study aims to investigate altered brain dynamics during the non-ordinary state of consciousness induced by hypnosis. We studied high-density EEG in nine healthy subjects during eyes-closed wakefulness and during hypnosis, induced by a muscle relaxation and eyes fixation procedure. Using hypotheses based on internal and external awareness brain networks, we assessed region-wise brain connectivity between six regions of interest (right and left frontal, right and left parietal, upper and lower midline regions) at the scalp level and compared across conditions. Data-driven, graph-theory analyses were also carried out to characterize brain network topology in terms of brain network segregation and integration. During hypnosis, we observed (1) increased delta connectivity between left and right frontal, as well as between right frontal and parietal regions, (2) decreased connectivity for alpha (between right frontal and parietal and between upper and lower midline regions) and beta-2 bands (between upper midline and right frontal, frontal and parietal, also between upper and lower midline regions), and (3) increased network segregation (short-range connections) in delta and alpha bands, and increased integration (long-range connections) in beta-2 band. These higher network integration and segregation were measured bilaterally in frontal and right parietal electrodes, which were identified as central hub regions during hypnosis. This modified connectivity and increased network integration-segregation properties suggest a modification of the internal and external awareness brain networks that may reflect efficient cognitive-processing and lower incidences of mind-wandering during hypnosis.
Disciplines :
Neurosciences & comportement
Auteur, co-auteur :
Panda, Rajanikant ✱; Université de Liège - ULiège > GIGA > GIGA Consciousness - Coma Science Group ; ULiège - University of Liège [BE] > GIGA Consciousness - Sensation & Perception Research Group
Vanhaudenhuyse, Audrey ✱; Centre Hospitalier Universitaire de Liège - CHU > > Service d'algologie - soins palliatifs ; Université de Liège - ULiège > GIGA > GIGA Consciousness - Sensation & Perception Research Group
Piarulli, Andrea ; Université de Liège - ULiège > GIGA > GIGA Consciousness - Coma Science Group
Annen, Jitka ; Université de Liège - ULiège > GIGA > GIGA Consciousness - Coma Science Group
Demertzi, Athina ; Université de Liège - ULiège > GIGA > GIGA CRC In vivo Imaging - Physiology of Cognition
Alnagger, Naji ; Université de Liège - ULiège > GIGA > GIGA Consciousness - Coma Science Group
Chennu, Srivas; university of Kent > School of Computing
Laureys, Steven ; Centre Hospitalier Universitaire de Liège - CHU > > Centre du Cerveau² ; Université de Liège - ULiège > GIGA > GIGA Consciousness - Coma Science Group
Faymonville, Marie-Elisabeth ✱; Université de Liège - ULiège > Département des sciences cliniques ; Centre Hospitalier Universitaire de Liège - CHU > > Institut d'oncologie
Gosseries, Olivia ✱; Université de Liège - ULiège > GIGA > GIGA Consciousness - Coma Science Group ; Université de Liège - ULiège > GIGA > GIGA Consciousness - Sensation & Perception Research Group
✱ Ces auteurs ont contribué de façon équivalente à la publication.
Langue du document :
Anglais
Titre :
Altered brain connectivity and network topological organization in a non-ordinary state of consciousness induced by hypnosis
Date de publication/diffusion :
2023
Titre du périodique :
Journal of Cognitive Neuroscience
ISSN :
0898-929X
eISSN :
1530-8898
Maison d'édition :
Cambridge Center for Behavioral Studies, Etats-Unis
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