Evidence map›Paper›PMID 24839083›Full record

ArticleHuman brain mapping2014

The dual facet of gamma oscillations: separate visual and decision making circuits as revealed by simultaneous EEG/fMRI.

João Castelhano, Isabel Catarina Duarte, Michael Wibral, Eugénio Rodriguez, Miguel Castelo-Branco

Open access · bronzeAbstract read
In one paragraph

Article in Human brain mapping, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
1.7field-weighted citation impact, top 17% 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

25 citing papers in PubMed, 54 citations in OpenAlex.

  1. Article
  2. The Anterior Insula Engages in Feature- and Context-Level Predictive Coding Processes for Recognition Judgments.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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  14. Probing the Link Between Perception and Oscillations: Lessons from Transcranial Alternating Current Stimulation.The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry · 2020
    Review
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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

5 authors at 3 institutions in 3 countries.

João CastelhanoVisual Neuroscience Laboratory, IBILI-Institute for Biomedical Imaging and Life Sciences, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; ICNAS-Institute for Nuclear Sciences Applied to Health, University of Coimbra, Coimbra, Portugal.
Isabel Catarina Duarte
Michael Wibral
Eugénio Rodriguez
Miguel Castelo-Branco
University of Coimbra · PTGoethe University Frankfurt · DEPontificia Universidad Católica de Chile · CL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It remains an outstanding question whether gamma-band oscillations reflect unitary cognitive processes within the same task. EEG/MEG studies do lack the resolution or coverage to address the highly debated question whether single gamma activity patterns are linked with multiple cognitive modules or alternatively each pattern associates with a specific cognitive module, within the same coherent perceptual task. One way to disentangle these issues would be to provide direct identification of their sources, by combining different techniques. Here, we directly examined these questions by performing simultaneous EEG/fMRI using an ambiguous perception paradigm requiring holistic integration. We found that distinct gamma frequency sub-bands reflect different neural substrates and cognitive mechanisms when comparing object perception states vs. no categorical perception. A low gamma sub-band (near 40 Hz) activity was tightly related to the decision making network, and in particular the anterior insula. A high gamma sub-band (∼60 Hz) could be linked to early visual processing regions. The demonstration of a clear functional topography for distinct gamma sub-bands within the same task shows that distinct gamma-band modulations underlie sensory processing and perceptual decision mechanisms.

Indexed as

Brain MappingAdultAnalysis of VarianceBrainDecision MakingElectroencephalographyFaceFemaleGamma RhythmHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleOxygenPattern Recognition, VisualPhotic StimulationOxygencognitive modulesgamma-band oscillationsmultimodal imagingsimultaneous EEG/fMRIsource localizationvisual perception

Identifiers

PMID24839083
PMCPMC6869291
OpenAlexW1662147535

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.