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Title: Identification of competing neural mechanisms underlying positive and negative perceptual hysteresis in the human visual system
Authors: Sayal, Alexandre
Sousa, Teresa
Duarte, João V
Costa, Gabriel Nascimento Ferreira da 
Martins, Ricardo Filipe Alves 
Castelo-Branco, Miguel 
Keywords: Bistable visual motion; Hysteresis; Perceptual decision; Perceptual history
Issue Date: 1-Nov-2020
Serial title, monograph or event: NeuroImage
Volume: 221
Abstract: Hysteresis is a well-known phenomenon in physics that relates changes in a system with its prior history. It is also part of human visual experience (perceptual hysteresis), and two different neural mechanisms might explain it: persistence (a cause of positive hysteresis), which forces to keep a current percept for longer, and adaptation (a cause of negative hysteresis), which in turn favors the switch to a competing percept early on. In this study, we explore the neural correlates underlying these mechanisms and the hypothesis of their competitive balance, by combining behavioral assessment with fMRI. We used machine learning on the behavioral data to distinguish between positive and negative hysteresis, and discovered a neural correlate of persistence at a core region of the ventral attention network, the anterior insula. Our results add to the understanding of perceptual multistability and reveal a possible mechanistic explanation for the regulation of different forms of perceptual hysteresis.
ISSN: 10538119
DOI: 10.1016/j.neuroimage.2020.117153
Rights: openAccess
Appears in Collections:I&D ICNAS - Artigos em Revistas Internacionais

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