Evidence map›Paper›PMID 34230106›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2021

No Evidence for Entrainment: Endogenous Gamma Oscillations and Rhythmic Flicker Responses Coexist in Visual Cortex.

Katharina Duecker, Tjerk P Gutteling, Christoph S Herrmann, Ole Jensen

Open access · hybridAbstract read
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 pooled it
7.3field-weighted citation impact, top 2% 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

51 citing papers in PubMed, 1 synthesis or guideline pooled it, 91 citations in OpenAlex.

  1. Pooled it
  2. Trial
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  20. Spectral tuning and after-effects in neural entrainment.Behavioral and brain functions : BBF · 2024
    Article
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

4 authors at 3 institutions in 2 countries.

Katharina DueckerCentre for Human Brain Health, School of Psychology, University of Birmingham, Birmingham B15 2SA, United Kingdom k.duecker@bham.ac.uk o.jensen@bham.ac.uk.ORCID https://orcid.org/0000-0001-7887-3395
Tjerk P GuttelingCentre for Human Brain Health, School of Psychology, University of Birmingham, Birmingham B15 2SA, United Kingdom.ORCID https://orcid.org/0000-0002-0934-418X
Christoph S HerrmannDepartment of Psychology, Faculty VI-Medicine and Health Sciences, Carl-von-Ossietzky University of Oldenburg, Oldenburg 26129, Germany.ORCID https://orcid.org/0000-0003-0323-2272
Ole JensenCentre for Human Brain Health, School of Psychology, University of Birmingham, Birmingham B15 2SA, United Kingdom k.duecker@bham.ac.uk o.jensen@bham.ac.uk.ORCID https://orcid.org/0000-0001-8193-8348
University of Birmingham · GBBirmingham City University · GBCarl von Ossietzky Universität Oldenburg · DE

Funding

Biotechnology and Biological Sciences Research CouncilWellcome Trust 207550/Z/17/Z
6 · The paper itself

Abstract

Over the past decades, numerous studies have linked cortical gamma oscillations (∼30-100 Hz) to neurocomputational mechanisms. Their functional relevance, however, is still passionately debated. Here, we asked whether endogenous gamma oscillations in the human brain can be entrained by a rhythmic photic drive >50 Hz. Such a noninvasive modulation of endogenous brain rhythms would allow conclusions about their causal involvement in neurocognition. To this end, we systematically investigated oscillatory responses to a rapid sinusoidal flicker in the absence and presence of endogenous gamma oscillations using magnetoencephalography (MEG) in combination with a high-frequency projector. The photic drive produced a robust response over visual cortex to stimulation frequencies of up to 80 Hz. Strong, endogenous gamma oscillations were induced using moving grating stimuli as repeatedly done in previous research. When superimposing the flicker and the gratings, there was no evidence for phase or frequency entrainment of the endogenous gamma oscillations by the photic drive. Unexpectedly, we did not observe an amplification of the flicker response around participants' individual gamma frequencies (IGFs); rather, the magnitude of the response decreased monotonically with increasing frequency. Source reconstruction suggests that the flicker response and the gamma oscillations were produced by separate, coexistent generators in visual cortex. The presented findings challenge the notion that cortical gamma oscillations can be entrained by rhythmic visual stimulation. Instead, the mechanism generating endogenous gamma oscillations seems to be resilient to external perturbation.

Indexed as

AdultBiological ClocksBrain MappingFemaleGamma RhythmHumansMagnetoencephalographyMalePhotic StimulationVisual CortexVisual Perceptionentrainmentflickerfrequency tagginggamma oscillationsmagnetoencephalographyneuronal oscillations

Identifiers

PMID34230106
PMCPMC8336697
OpenAlexW3182573971

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.