Cited by 32Psychedelics and Drug StudiesVisual perception and processing mechanismsHallucinations in medical conditions

Effects of ayahuasca on binocular rivalry with dichoptic stimulus alternation.

Frecska, E., White, K. D., Luna, L. E.·2004·Psychopharmacology

Abstract

Rationale During binocular rivalry, two incompatible images are presented to each eye and these monocular stimuli compete for perceptual dominance, with one pattern temporarily suppressed from awareness. One variant of stimulus presentation in binocular rivalry experiments is dichoptic stimulus alternation (DSA), when stimuli are applied to the eyes in rapid reversals. There is preliminary report that in contrast with healthy controls, schizophrenic patients can maintain binocular rivalry even at very high DSA rates.Objective The study was undertaken to investigate whether binocular rivalry survives high rates of DSA induced by the South American hallucinogenic beverage ayahuasca.Methods Ten individuals who were participating in ayahuasca ceremonials were requested to volunteer for binocular rivalry tests (DSA=0, 3.75, 7.5, 15 and 30 Hz) without and after drinking the brew.Results Ingestion of ayahuasca increased mean dominance periods both in standard binocular rivalry conditions (no DSA) and tests with DSA. At higher DSA rates (15 and 30 Hz) the total length of dominance periods was longer on the brew.Conclusion It is discussed that ayahuasca-induced survival of binocular rivalry at high DSA rates may be related to slow visual processing and increased mean dominance periods may result from hallucinogen-induced alteration of gamma oscillations in the visual pathways.

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Crossref · 10.1007/s00213-003-1701-x

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Authors
Frecska, E., White, K. D., & Luna, L. E.
Affiliations
  • University of Florida (US)
  • Stockholm School of Economics in Russia (RU)
Corresponding author
Frecska, E.
Venue
Psychopharmacology
Published
2004-04-01
Volume
173
Issue
1-2
Pages
79-87
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W2042603095
Cited by
32
References
68
Citations by year
2024: 1 · 2023: 2 · 2022: 3 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 3 · 2015: 1 · 2013: 4 · 2012: 2
FWCI
3.20
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • University of Debrecen Electronic Archive (University of Debrecen) (submittedVersion)
Topics
  • Social Sciences › Psychology › Clinical Psychology › Psychedelics and Drug Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hallucinations in medical conditions
Keywords
ayahuasca, binocular rivalry, visual perception, hallucinogens, gamma oscillations, visual processing, schizophrenia, perceptual suppression
MeSH terms
Adult, Aged, Female, Hallucinogens, Harmine, Humans, Male, Middle Aged, Photic Stimulation, Plant Extracts, Psychomotor Performance, Visual Perception, Vision, Binocular, Vision Disparity, Banisteriopsis

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