Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/jspui/handle/123456789/23825
Title: Shannon entropy of brain functional complex networks under the infuence of the psychedelic Ayahuasca
Authors: Viol, A.
Palhano-Fontes, Fernanda
Onias, Heloisa
Araujo, Draulio B. de
Viswanathan, G. M.
Keywords: Ayahuasca;Shannon entropy;Psychedelic;fMRI
Issue Date: 7-Aug-2017
Portuguese Abstract: The entropic brain hypothesis holds that the key facts concerning psychedelics are partially explained in terms of increased entropy of the brain’s functional connectivity. Ayahuasca is a psychedelic beverage of Amazonian indigenous origin with legal status in Brazil in religious and scientific settings. In this context, we use tools and concepts from the theory of complex networks to analyze resting state fMRI data of the brains of human subjects under two distinct conditions: (i) under ordinary waking state and (ii) in an altered state of consciousness induced by ingestion of Ayahuasca. We report an increase in the Shannon entropy of the degree distribution of the networks subsequent to Ayahuasca ingestion. We also find increased local and decreased global network integration. Our results are broadly consistent with the entropic brain hypothesis. Finally, we discuss our findings in the context of descriptions of “mind-expansion” frequently seen in self-reports of users of psychedelic drugs.
URI: https://repositorio.ufrn.br/jspui/handle/123456789/23825
Appears in Collections:ICe - Artigos publicados em periódicos

Files in This Item:
File Description SizeFormat 
DraulioAraújo_ICe_2017_Shannon entropy.pdfDraulioAraújo_ICe_2017_Shannon entropy4,78 MBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.