Dynamic brain communication underwriting face pareidolia

Author:

Romagnano Valentina1ORCID,Kubon Julian1ORCID,Sokolov Alexander N.1,Fallgatter Andreas J.1,Braun Christoph23ORCID,Pavlova Marina A.1ORCID

Affiliation:

1. Social Neuroscience Unit, Department of Psychiatry and Psychotherapy, Tübingen Center for Mental Health, Medical School and University Hospital, Eberhard Karls University of Tübingen, Tübingen 72076, Germany

2. Magnetoencephalography Center, Medical School and University Hospital, Eberhard Karls University of Tübingen, Tübingen 72076, Germany

3. Hertie Institute for Clinical Brain Research, Medical School and University Hospital, Eberhard Karls University of Tübingen, Tübingen 72076, Germany

Abstract

Face pareidolia is a tendency to seeing faces in nonface images that reflects high tuning to a face scheme. Yet, studies of the brain networks underwriting face pareidolia are scarce. Here, we examined the time course and dynamic topography of gamma oscillatory neuromagnetic activity while administering a task with nonface images resembling a face. Images were presented either with canonical orientation or with display inversion that heavily impedes face pareidolia. At early processing stages, the peaks in gamma activity (40 to 45 Hz) to images either triggering or not face pareidolia originate mainly from the right medioventral and lateral occipital cortices, rostral and caudal cuneus gyri, and medial superior occipital gyrus. Yet, the difference occurred at later processing stages in the high-frequency range of 80 to 85 Hz over a set of the areas constituting the social brain. The findings speak rather for a relatively late neural network playing a key role in face pareidolia. Strikingly, a cutting-edge analysis of brain connectivity unfolding over time reveals mutual feedforward and feedback intra- and interhemispheric communication not only within the social brain but also within the extended large-scale network of down- and upstream regions. In particular, the superior temporal sulcus and insula strongly engage in communication with other brain regions either as signal transmitters or recipients throughout the whole processing of face-pareidolia images.

Funder

Deutsche Forschungsgemeinschaft

Reinhold Beitlich Stiftung

Publisher

Proceedings of the National Academy of Sciences

Reference67 articles.

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