Neural correlates of visual awareness following binocular rivalry start at different times for different stimulus dimensions

Abstract

Event Abstract Back to Event Neural correlates of visual awareness following binocular rivalry start at different times for different stimulus dimensions Sandra Veser1* and U. Roeber1 1 University of Leipzig, Germany During binocular rivalry, a supra-threshold stimulus presented to one eye intermittently disappears for several seconds. In order to explore the fate of such an invisible stimulus, we investigated neural activity following transitions from binocular rivalry stimuli to binocular fusion stimuli by changing the stimulus viewed by one eye. Depending on the prevailing percept, these changes either elicited a change in perception or did not. This procedure allowed for time-locked event-related potential analyses to physically identical events differing in their perceptual consequences. When a stimulus changed without awareness, similar but attenuated neural responses were found compared to when a stimulus changed with awareness. The onset of the attenuation, however, differed depending on the specific stimulus dimension that was changed: with changes in stimulus orientation or shape awareness-dependent modulations began at about 100 ms (P1), with changes in color at about 200 ms (N1), and with changes in motion at about 220 ms (P2). Despite the differences in onset times, source activity correlated with perception for all changes was in similar ventro-lateral occipito-temporal networks. This suggests that visual awareness is mediated by dimension-unspecific superior cortical areas but its effects follow a dimension-specific time-course. This research was supported by the German Research Foundation (DFG grant no. RO 3061/1-2). Conference: 10th International Conference on Cognitive Neuroscience, Bodrum, Turkey, 1 Sep - 5 Sep, 2008. Presentation Type: Oral Presentation Topic: Symposium 11: Visual consciousness at different levels of the brain Citation: Veser S and Roeber U (2008). Neural correlates of visual awareness following binocular rivalry start at different times for different stimulus dimensions. Conference Abstract: 10th International Conference on Cognitive Neuroscience. doi: 10.3389/conf.neuro.09.2009.01.050 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 27 Nov 2008; Published Online: 27 Nov 2008. * Correspondence: Sandra Veser, University of Leipzig, Leipzig, Germany, urte@uni-leipzig.de Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Sandra Veser U. Roeber Google Sandra Veser U. Roeber Google Scholar Sandra Veser U. Roeber PubMed Sandra Veser U. Roeber Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.