Event related potentials (ERP) reveal a robust response to visual symmetry in unattended visual regions

Derpsch, Yiovanna ORCID: https://orcid.org/0000-0002-4380-5058, Tyson-Carr, John, Rampone, Giulia, Bertamini, Marco and Makin, Alexis D.J. (2024) Event related potentials (ERP) reveal a robust response to visual symmetry in unattended visual regions. NeuroImage, 290. ISSN 1053-8119

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Abstract

Visual symmetry at fixation generates a bilateral Event Related Potential (ERP) called the Sustained Posterior Negativity (SPN). Symmetry presented in the left visual hemifield generates a contralateral SPN over the right hemisphere and vice versa. The current study examined whether the contralateral SPN is modulated by the focus of spatial attention. On each trial there were two dot patterns, one to the left of fixation, and one to the right of fixation. A central arrow cue pointed to one of the patterns and participants discriminated its regularity (symmetry or random). We compared contralateral SPN amplitude generated by symmetry at attended and unattended spatial locations. While the response to attended symmetry was slightly enhanced, the response to unattended symmetry was still substantial. Although visual symmetry detection is a computational challenge, we conclude that the brain processes visual symmetry in unattended parts of the visual field.

Item Type:	Article
Additional Information:	Data sharing: All ERP and behavioral data, and codes for analysis and stimulus presentation, are freely available on Open Science Framework (https://osf.io/vmy5n/). We are happy for other researchers to use this material. This is also Project 24 in the SPN catalogue (https://osf.io/2sncj/).
Uncontrolled Keywords:	attention,eeg,perception,sustained posterior negativity,symmetry,neurology,cognitive neuroscience ,/dk/atira/pure/subjectarea/asjc/2800/2808
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:	21 Jul 2026 14:47
Last Modified:	26 Jul 2026 05:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/103937
DOI:	10.1016/j.neuroimage.2024.120568

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