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Analysis of institutional authors

Moratti SAuthorDel-Pozo FAuthorStrange, B AAuthor

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July 5, 2020
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Dynamic gamma frequency feedback coupling between higher and lower order visual cortices underlies perceptual completion in humans

Publicated to: NEUROIMAGE. 86 470-479 - 2014-02-01 86(), DOI: 10.1016/j.neuroimage.2013.10.037

Authors:

Moratti, S; Méndez-Bértolo, C; Del-Pozo, F; Strange, BA
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Affiliations

Centro de Tecnologia Biomedica (CTB) - Author
Grupo de Bioingeniería y Telemedicina. Universidad Politécnica de Madrid - Author
Tech Univ Madrid UPM, Ctr Biomed Technol, Lab Clin Neurosci, Madrid 28223, Spain - Author
Tech Univ Madrid UPM, Ctr Biomed Technol, Lab Cognit & Computat Neurosci, Madrid 28223, Spain - Author
UCM UPM, Madrid 28040, Spain - Author
Univ Complutense Madrid, Dept Basic Psychol 1, Madrid 28223, Spain - Author
Universidad Complutense de Madrid - Author
Universidad Politécnica de Madrid - Author
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Abstract

To perceive a coherent environment, incomplete or overlapping visual forms must be integrated into meaningful coherent percepts, a process referred to as Gestalt formation or perceptual completion. Increasing evidence suggests that this process engages oscillatory neuronal activity in a distributed neuronal assembly. A separate line of evidence suggests that Gestalt formation requires top-down feedback from higher order brain regions to early visual cortex. Here we combine magnetoencephalography (MEG) and effective connectivity analysis in the frequency domain to specifically address the effective coupling between sources of oscillatory brain activity during Gestalt formation. We demonstrate that perceptual completion of two-tone Mooney faces induces increased gamma frequency band power (55-71. Hz) in human early visual, fusiform and parietal cortices. Within this distributed neuronal assembly fusiform and parietal gamma oscillators are coupled by forward and backward connectivity during Mooney face perception, indicating reciprocal influences of gamma activity between these higher order visual brain regions. Critically, gamma band oscillations in early visual cortex are modulated by top-down feedback connectivity from both fusiform and parietal cortices. Thus, we provide a mechanistic account of Gestalt perception in which gamma oscillations in feature sensitive and spatial attention-relevant brain regions reciprocally drive one another and convey global stimulus aspects to local processing units at low levels of the sensory hierarchy by top-down feedback. Our data therefore support the notion of inverse hierarchical processing within the visual system underlying awareness of coherent percepts. © 2013 Elsevier Inc.
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Keywords

dynamic causal modelsfeedbackgamma band activityperceptual completionAdultAttentionBand activityBeta rhythmsBrain mappingBrain wavesClosure processesDynamic causal modelsFeedbackFeedback, physiologicalFemaleFusiform face areaGamma band activityGestalt psychologyHuman brain activityHumansMaleNerve netNeural systemsObject-recognition areasOscillatory neuronal responsesPattern recognition, visualPerceptual completionReverse hierarchical visual processingSpatial attentionVisual cortex

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal NEUROIMAGE due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2014, it was in position 24/252, thus managing to position itself as a Q1 (Primer Cuartil), in the category Neurosciences.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-04-25:

  • Google Scholar: 33
  • WoS: 25
  • Scopus: 24
  • Europe PMC: 8
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-25:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 117.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 117 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 2.
  • The number of mentions on the social network X (formerly Twitter): 1 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/26428/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 437
  • Downloads: 274
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Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (MORATTI, STEPHAN) and Last Author (STRANGE, BRYAN).

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