Cited by 454Psychedelics and Drug StudiesFunctional Brain Connectivity StudiesPain Management and Placebo Effect

The DOI matches its Crossref record; 62 of the 62 references it cites were found in a registry or an index.

The Psychedelic State Induced by Ayahuasca Modulates the Activity and Connectivity of the Default Mode Network

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Palhano-Fontes, Fernanda, Andrade, Katia C., Tofoli, Luis F., Santos, Antonio C., Crippa, Jose Alexandre S., Hallak, Jaime E. C., Ribeiro, Sidarta, de Araujo, Draulio B.·2015·PLOS ONE

Abstract

The experiences induced by psychedelics share a wide variety of subjective features, related to the complex changes in perception and cognition induced by this class of drugs. A remarkable increase in introspection is at the core of these altered states of consciousness. Self-oriented mental activity has been consistently linked to the Default Mode Network (DMN), a set of brain regions more active during rest than during the execution of a goal-directed task. Here we used fMRI technique to inspect the DMN during the psychedelic state induced by Ayahuasca in ten experienced subjects. Ayahuasca is a potion traditionally used by Amazonian Amerindians composed by a mixture of compounds that increase monoaminergic transmission. In particular, we examined whether Ayahuasca changes the activity and connectivity of the DMN and the connection between the DMN and the task-positive network (TPN). Ayahuasca caused a significant decrease in activity through most parts of the DMN, including its most consistent hubs: the Posterior Cingulate Cortex (PCC)/Precuneus and the medial Prefrontal Cortex (mPFC). Functional connectivity within the PCC/Precuneus decreased after Ayahuasca intake. No significant change was observed in the DMN-TPN orthogonality. Altogether, our results support the notion that the altered state of consciousness induced by Ayahuasca, like those induced by psilocybin (another serotonergic psychedelic), meditation and sleep, is linked to the modulation of the activity and the connectivity of the DMN.

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Metadata

Authors
Palhano-Fontes, F., Andrade, K. C., Tofoli, L. F., Santos, A. C., Crippa, J. A. S., Hallak, J. E. C., Ribeiro, S., & de Araujo, D. B.
Affiliations
  • Universidade Federal do Rio Grande do Norte (BR)
  • Universidade de São Paulo (BR)
Venue
PLOS ONE
Published
2015-02-18
Volume
10
Issue
2
Pages
e0118143
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2093477837
Cited by
454
References
60
Citations by year
2026: 34 · 2025: 41 · 2024: 45 · 2023: 61 · 2022: 54 · 2021: 49 · 2020: 40 · 2019: 47 · 2018: 31 · 2017: 25 · 2016: 20 · 2015: 6
FWCI
33.90
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (publishedVersion, other-oa)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
  • Americanae (AECID Library) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Fundação de Amparo à Pesquisa do Estado de São Paulo
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico
  • Financiadora de Estudos e Projetos
Topics
  • Social Sciences › Psychology › Clinical Psychology › Psychedelics and Drug Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
Keywords
ayahuasca, default mode network, task-positive network, altered states of consciousness, psychedelic effects, posterior cingulate cortex, precuneus, medial prefrontal cortex, functional connectivity, self-reflection, psilocybin, meditation, sleep
MeSH terms
Adult, Consciousness Disorders, Female, Gyrus Cinguli, Hallucinogens, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Psilocybin, Prefrontal Cortex, Banisteriopsis, Young Adult, Connectome

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