Electrophysiological priming effects confirm that the extrastriate symmetry network is not gated by luminance polarity

Makin, Alexis D.J., Piovesan, Andrea, Tyson-Carr, John, Rampone, Giulia, Bertamini, Marco and Derpsch, Yiovi ORCID: https://orcid.org/0000-0002-4380-5058 (2021) Electrophysiological priming effects confirm that the extrastriate symmetry network is not gated by luminance polarity. European Journal of Neuroscience, 53 (4). pp. 964-973. ISSN 0953-816X

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Abstract

It is known that the extrastriate cortex is activated by visual symmetry. This activation generates an ERP component called the Sustained Posterior Negativity (SPN). SPN amplitude increases (i.e., becomes more negative) with repeated presentations. We exploited this SPN priming effect to test whether the extrastriate symmetry response is gated by element luminance polarity. On each trial, participants observed three stimuli (patterns of dots) in rapid succession (500 ms. with 200 ms. gaps). The patterns were either symmetrical or random. The dot elements were either black or white on a grey background. The triplet sequences either showed repeated luminance (black > black > black, or white > white > white) or changing luminance (black > white > black, or white > black > white). As predicted, SPN priming was comparable in repeated and changing luminance conditions. Therefore, symmetry with black elements is not processed independently from symmetry with white elements. Source waveform analysis confirmed that this priming happened within the extrastriate symmetry network. We conclude that the network pools information across luminance polarity channels.

Item Type:	Article
Additional Information:	DATA AVAILABILITY STATEMENT: The experiments, stimuli and raw pre-processed EEG data are available on Open Science Framework (https://osf.io/2yjus/). We are happy for other researchers to use this material.
Uncontrolled Keywords:	luminance polarity,reflection,regularity,repetition enhancement,sustained posterior negativity,general neuroscience ,/dk/atira/pure/subjectarea/asjc/2800/2800
Faculty \ School:	Faculty of Social Sciences > School of Psychology
Related URLs:	https://www.scopus.com/pages/publication... https://livrepository.liverpool.ac.uk/id...
Depositing User:	LivePure Connector
Date Deposited:	29 Jun 2026 14:37
Last Modified:	05 Jul 2026 05:29
URI:	https://ueaeprints.uea.ac.uk/id/eprint/103521
DOI:	10.1111/ejn.14966

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