Automatic Stimulus-Change Detection in the Visual Modality: an Fmri and ERPs Study

Event Abstract Back to Event Automatic stimulus-change detection in the visual modality: an fMRI and ERPs study Marie Gomot1*, Marie-Hélène Giard2, Pierre Fonlupt2 and Nicole Bruneau1 1 INSERM U930, Université François Rabelais de Tours, France 2 INSERM U821, France A number of studies now supports the existence of an automatic detection of deviancy in the visual system and therefore of a visual analog of the MMN (vMMN). However little is known about the brain generators involved in this processing. The present study was designed to localize in both time and space the brain activations elicited by unattended visual deviant stimuli by mean of fMRI and ERPs methods. Twelve healthy volunteers participated in the experiment. The first part of the experiment was an event-related fMRI paradigm in which stimuli consisted in the dynamic deformations of a circle (deviant, p=0.15), while a visual concurrent task was required. In the second part, subjects received the same stimulus sequence and performed the same task while their EEG was recorded. Electrophysiological results showed a vMMN over posterior sites at around 200 ms together with a frontal negative field. SCD maps allowed distinguishing between two posterior sinks on each hemiscalp, located over parietal and over occipital sites. Changes in BOLD response were evidenced bilaterally in different regions of the occipital cortex when deviant stimuli were presented, but also in the superior parietal and right middle frontal gyri. This study allowed to evidence regional brain activity associated with passive detection of infrequently occurring visual deviant stimuli. Electrophysiological mapping and fMRI results showed activity in the modality-specific sensory cortex, but also in non specific areas involved in preattentional processing of changing events. Moreover, these findings suggest the involvement of both the ventral and the dorsal visual pathway during such preattentive change-detection processing. Keywords: Cognition, EEG, fMRI Conference: XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011. Presentation Type: Poster Presentation Topic: Poster Sessions: Neurophysiology of Cognition and Attention Citation: Gomot M, Giard M, Fonlupt P and Bruneau N (2011). Automatic stimulus-change detection in the visual modality: an fMRI and ERPs study. Conference Abstract: XI International Conference on Cognitive Neuroscience (ICON XI). doi: 10.3389/conf.fnhum.2011.207.00449 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: 25 Nov 2011; Published Online: 28 Nov 2011. * Correspondence: Dr. Marie Gomot, INSERM U930, Université François Rabelais de Tours, Tours, France, gomot@univ-tours.fr 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 Marie Gomot Marie-Hélène Giard Pierre Fonlupt Nicole Bruneau Google Marie Gomot Marie-Hélène Giard Pierre Fonlupt Nicole Bruneau Google Scholar Marie Gomot Marie-Hélène Giard Pierre Fonlupt Nicole Bruneau PubMed Marie Gomot Marie-Hélène Giard Pierre Fonlupt Nicole Bruneau 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.