Evidence map›Paper›PMID 26010878›Full record

ArticleHuman brain mapping2015

Finding the self by losing the self: Neural correlates of ego-dissolution under psilocybin.

Alexander V Lebedev, Martin Lövdén, Gidon Rosenthal, Amanda Feilding, David J Nutt, Robin L Carhart-Harris

Open access · greenAbstract read
In one paragraph

Article in Human brain mapping, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 132 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
132citing papers in PubMed, 5 pooled it
17.4field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

132 citing papers in PubMed, 5 syntheses or guidelines pooled it, 340 citations in OpenAlex.

  1. Pooled it
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  4. Default Mode Network Modulation by Psychedelics: A Systematic Review.The international journal of neuropsychopharmacology · 2023
    Pooled it
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  6. Trial
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  9. Me, myself, bye: regional alterations in glutamate and the experience of ego dissolution with psilocybin.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2020
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  11. Effective connectivity changes in LSD-induced altered states of consciousness in humans.Proceedings of the National Academy of Sciences of the United States of America · 2019
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72 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 4 countries.

Alexander V LebedevAging Research Center, Karolinska Institutet & Stockholm University, Sweden.
Martin LövdénAging Research Center, Karolinska Institutet & Stockholm University, Sweden.
Gidon RosenthalDepartment of Brain and Cognitive Sciences, Ben-Gurion University of the Negev, Israel.
Amanda FeildingThe Beckley Foundation, Beckley Park, United Kingdom.
David J NuttDivision of Brain Sciences, Department of Medicine, Centre for Neuropsychopharmacology, Imperial College London, United Kingdom.
Robin L Carhart-HarrisDivision of Brain Sciences, Department of Medicine, Centre for Neuropsychopharmacology, Imperial College London, United Kingdom.
Imperial College London · GBStockholm University · SEBeckley Foundation · GBBen-Gurion University of the Negev · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Ego-disturbances have been a topic in schizophrenia research since the earliest clinical descriptions of the disorder. Manifesting as a feeling that one's "self," "ego," or "I" is disintegrating or that the border between one's self and the external world is dissolving, "ego-disintegration" or "dissolution" is also an important feature of the psychedelic experience, such as is produced by psilocybin (a compound found in "magic mushrooms"). Fifteen healthy subjects took part in this placebo-controlled study. Twelve-minute functional MRI scans were acquired on two occasions: subjects received an intravenous infusion of saline on one occasion (placebo) and 2 mg psilocybin on the other. Twenty-two visual analogue scale ratings were completed soon after scanning and the first principal component of these, dominated by items referring to "ego-dissolution", was used as a primary measure of interest in subsequent analyses. Employing methods of connectivity analysis and graph theory, an association was found between psilocybin-induced ego-dissolution and decreased functional connectivity between the medial temporal lobe and high-level cortical regions. Ego-dissolution was also associated with a "disintegration" of the salience network and reduced interhemispheric communication. Addressing baseline brain dynamics as a predictor of drug-response, individuals with lower diversity of executive network nodes were more likely to experience ego-dissolution under psilocybin. These results implicate MTL-cortical decoupling, decreased salience network integrity, and reduced inter-hemispheric communication in psilocybin-induced ego disturbance and suggest that the maintenance of "self"or "ego," as a perceptual phenomenon, may rest on the normal functioning of these systems.

Indexed as

AdultBrainBrain MappingEgoFemaleHallucinogensHumansMagnetic Resonance ImagingMaleNeural PathwaysPerceptionPrincipal Component AnalysisPsilocybinSelf ConceptHallucinogensPsilocybinconnectivityconsciousnessego-disturbancesfMRIgraph theoryichstörungenmedial temporal lobepsychedelicspsychosissense of self

Identifiers

PMID26010878
PMCPMC6869189
OpenAlexW2100182643

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.