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

Makin, Alexis DJ ORCID: 0000-0002-4490-7400, Tyson-Carr, John ORCID: 0000-0003-3364-2184, Derpsch, Yiovanna, Rampone, Giulia ORCID: 0000-0002-2710-688X and Bertamini, Marco ORCID: 0000-0001-8617-6864 (2021) Electrophysiological priming effects demonstrate independence and overlap of visual regularity representations in the extrastriate cortex PLOS ONE, 16 (7). e0254361-. ISSN 1932-6203, 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
Uncontrolled Keywords:	Visual Cortex, Humans, Electroencephalography, Motor Activity, Pattern Recognition, Visual, Evoked Potentials, Adolescent, Adult, Middle Aged, Male, Young Adult
Divisions:	Faculty of Health & Life Sciences Faculty of Health & Life Sciences > Inst. Population Health
Depositing User:	Symplectic Admin
Date Deposited:	12 Aug 2021 09:19
Last Modified:	16 Jun 2026 11:39
DOI:	10.1371/journal.pone.0254361
Open Access URL:	http://doi.org/10.1371/journal.pone.0254361
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3132469
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