Gaze direction effects in the primary visual cortex are eccentricity-dependent

Abstract

Event Abstract Back to Event Gaze direction effects in the primary visual cortex are eccentricity-dependent Simona Celebrini1*, Jean-Baptiste Durand1 and Yves Trotter1 1 Université de Toulouse, CerCo, UPS CNRS, UMR5549, France By integrating visual and eye position signals, V1 neurons with central receptive fields participate in the neuronal mechanisms underlying the localization of objects in space. Because of anatomical and functional differences in their cortical representations and the presence of vertical disparity in eccentric receptive fields, the foveal and peripheral visual fields might not be equally involved in this localization process. To evaluate their respective contributions, we compared the effects of similar gaze direction changes on responses of neurons located in the central and peripheral representations of V1. Single and multi unit recordings were made in dorsal and calcarine V1 on awake behaving monkeys performing a visual fixation task at different gaze eccentricities. Although we did not find a higher frequency of gain effects, we report larger gain values and a higher sensitivity to gaze direction in peripheral V1. We also report a clear influence of the receptive field egocentric eccentricity; peripheral V1 cells present a higher signal-to-noise ratio when responding to objects located in the straight-ahead position in space. This result suggests that egocentric information could be present at the level of single neurons in V1. Furthermore, we propose that eye position information implicated in visual gains, is mainly carried by extra retinal signal of sensory motor origin. Conference: 3rd Mediterranean Conference of Neuroscience , Alexandria, Egypt, 13 Dec - 16 Dec, 2009. Presentation Type: Oral Presentation Topic: Sensory systems Citation: Celebrini S, Durand J and Trotter Y (2009). Gaze direction effects in the primary visual cortex are eccentricity-dependent. Front. Neurosci. Conference Abstract: 3rd Mediterranean Conference of Neuroscience . doi: 10.3389/conf.neuro.01.2009.16.116 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: 23 Nov 2009; Published Online: 23 Nov 2009. * Correspondence: Simona Celebrini, Université de Toulouse, CerCo, UPS CNRS, UMR5549, Toulouse, France, simona@cerco.ups-tlse.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 Simona Celebrini Jean-Baptiste Durand Yves Trotter Google Simona Celebrini Jean-Baptiste Durand Yves Trotter Google Scholar Simona Celebrini Jean-Baptiste Durand Yves Trotter PubMed Simona Celebrini Jean-Baptiste Durand Yves Trotter 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.