Electrophysiological priming effects demonstrate independence and overlap of visual regularity representations in the extrastriate cortex

Makin, Alexis D.J., Tyson-Carr, John, Derpsch, Yiovanna ORCID: https://orcid.org/0000-0002-4380-5058, Rampone, Giulia and Bertamini, Marco (2021) Electrophysiological priming effects demonstrate independence and overlap of visual regularity representations in the extrastriate cortex. PLoS One, 16 (7 July). ISSN 1932-6203

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Abstract

An Event Related Potential (ERP) component called the Sustained Posterior Negativity (SPN) is generated by regular visual patterns (e.g. vertical reflectional symmetry, horizontal reflectional symmetry or rotational symmetry). Behavioural studies suggest symmetry becomes increasingly salient when the exemplars update rapidly. In line with this, Experiment 1 (N = 48) found that SPN amplitude increased when three different reflectional symmetry patterns were presented sequentially. We call this effect ‘SPN priming’. We then exploited SPN priming to investigate independence of different symmetry representations. SPN priming did not survive changes in retinal location (Experiment 2, N = 48) or non-orthogonal changes in axis orientation (Experiment 3, N = 48). However, SPN priming transferred between vertical and horizontal axis orientations (Experiment 4, N = 48) and between reflectional and rotational symmetry (Experiment 5, N = 48). SPN priming is interesting in itself, and a useful new method for identifying functional boundaries of the symmetry response. We conclude that visual regularities at different retinal locations are coded independently. However, there is some overlap between different regularities presented at the same retinal location.

Item Type:	Article
Additional Information:	Publisher Copyright: Copyright: © 2021 Makin et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Uncontrolled Keywords:	general ,/dk/atira/pure/subjectarea/asjc/1000
Faculty \ School:	Faculty of Social Sciences > School of Psychology
Related URLs:	https://www.scopus.com/pages/publication...
Depositing User:	LivePure Connector
Date Deposited:	03 Jul 2026 15:12
Last Modified:	05 Jul 2026 05:29
URI:	https://ueaeprints.uea.ac.uk/id/eprint/103612
DOI:	10.1371/journal.pone.0254361

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