Cited by 151Visual perception and processing mechanismsNeural dynamics and brain functionMultisensory perception and integration

Perception-related modulations of local field potential power and coherence in primary visual cortex of awake monkey during binocular rivalry.

Gail, A.·2004·Cerebral Cortex

Abstract

Cortical synchronization at gamma-frequencies (35-90 Hz) has been proposed to define the connectedness among the local parts of a perceived visual object. This hypothesis is still under debate. We tested it under conditions of binocular rivalry (BR), where a monkey perceived alternations among conflicting gratings presented singly to each eye at orthogonal orientations. We made multi-channel microelectrode recordings of multi-unit activity (MUA) and local field potentials (LFP) from striate cortex (V1) during BR while the monkey indicated his perception by pushing a lever. We analyzed spectral power and coherence of MUA and LFP over 4-90 Hz. As in previous work, coherence of gamma-signals in most pairs of recording locations strongly depended on grating orientation when stimuli were presented congruently in both eyes. With incongruent (rivalrous) stimulation LFP power was often consistently modulated in consonance with the perceptual state. This was not visible in MUA. These perception-related modulations of LFP occurred at low and medium frequencies (< 30 Hz), but not at gamma-frequencies. Perception-related modulations of LFP coherence were also restricted to the low-medium range. In conclusion, our results do not support the expectation that gamma-synchronization in V1 is related to the perceptual state during BR, but instead suggest a perception-related role of synchrony at low and medium frequencies.

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Crossref · 10.1093/cercor/bhg129

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Authors
Gail, A.
Affiliations
Philipps University of Marburg (DE)
Corresponding author
Gail, A.
Venue
Cerebral Cortex
Published
2004-03-01
Volume
14
Issue
3
Pages
300-313
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2162623915
Cited by
151
References
66
Citations by year
2026: 2 · 2025: 7 · 2024: 4 · 2023: 3 · 2022: 6 · 2021: 2 · 2020: 1 · 2019: 4 · 2018: 5 · 2017: 2 · 2016: 3 · 2015: 6 · 2014: 6 · 2013: 13 · 2012: 7
FWCI
5.20
Type
journal article
Language
en
Open access
closed
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
  • GRO (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Multisensory perception and integration
Keywords
binocular rivalry, primary visual cortex, local field potentials, gamma synchronization, perceptual states, multi-unit activity, grating orientation, perceptual conflict
MeSH terms
Algorithms, Animals, Cortical Synchronization, Electrophysiology, Evoked Potentials, Visual, Fixation, Ocular, Individuality, Functional Laterality, Macaca mulatta, Male, Microelectrodes, Photic Stimulation, Psychophysics, Visual Cortex, Visual Perception, Vision, Binocular

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