Integration of motion and disparity cues to depth in monkey brain

Abstract

Event Abstract Back to Event Integration of motion and disparity cues to depth in monkey brain Marcelo Armendariz1*, Andrew Welchman2, Hiroshi Ban2 and Wim Vanduffel1 1 KU Leuven, Neuroscience, Belgium 2 University of Birmingham, School of Psychology, United Kingdom Recognising and interacting with objects depends on knowing the three-dimensional (3D) structure of the world around us. Estimating the depth structure of the environment is a principal function of the visual system in primates, enabling many key computations, such as segmentation, object recognition, material perception and the guidance of movements. The brain exploits a range of depth cues to estimate depth, combining information from shading and shadows to linear perspective, motion and binocular disparity. To solve the depth perception there are two computationally distinct ways: independence or fusion. Traditionally, this process has been broadly conceived in modular terms, with the independent processing of individual cues followed by a combination stage in which the influence of each cue reflects the reliability with which it is encoded. However, a recent study with humans (Ban et al., 2012), using fMRI for decoding depth from binocular disparity and motion parallax cues, provided evidence that dorsal visual areas are involved in the fusion mechanism that combines the two cues into a single depth perception. They found that fMRI responses are more discriminable when two cues (binocular disparity and relative motion) concurrently signal depth, since the variance is significantly reduced. Our present study aims to investigate cue integration in monkey (Macaca mulatta) with fMRI. We presented the monkey a set of stimuli representing near or far depths defined by motion parallax, binocular disparity and the combination of both in congruent and incongruent ways. We performed statistical data analysis to obtain all the activation areas in the brain involved in depth processing: V1, V2, V3, V3A, V4, MST, MT, FST, F5 and MIP. Once the regions of interest are defined, we will use multivoxel pattern analysis (MVPA) to reveal depth selectivity in macaque cortex (Preston et al., 2008) and assess the fusion mechanism for cue integration. References Ban, H., Preston, T.J., Meeson, A.,& Welchman, A.E. The integration of motion and disparity cues to depth in dorsal visual cortex. Nature Neuroscience 15, 636–643 (2012). Preston, T.J., Li, S., Kourtzi, Z. & Welchman, A.E. Multivoxel pattern selectivity for perceptually relevant binocular disparities in the human brain. J. Neurosci. 28, 11315–11327 (2008). Keywords: fMRI, monkey, Depth Perception, binocular diparity, motion parallax Conference: Imaging the brain at different scales: How to integrate multi-scale structural information?, Antwerp, Belgium, 2 Sep - 6 Sep, 2013. Presentation Type: Poster presentation Topic: Poster session Citation: Armendariz M, Welchman A, Ban H and Vanduffel W (2013). Integration of motion and disparity cues to depth in monkey brain. Front. Neuroinform. Conference Abstract: Imaging the brain at different scales: How to integrate multi-scale structural information?. doi: 10.3389/conf.fninf.2013.10.00042 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 Aug 2013; Published Online: 31 Aug 2013. * Correspondence: Mr. Marcelo Armendariz, KU Leuven, Neuroscience, Leuven, Belgium, m.zimarron@gmail.com 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 Marcelo Armendariz Andrew Welchman Hiroshi Ban Wim Vanduffel Google Marcelo Armendariz Andrew Welchman Hiroshi Ban Wim Vanduffel Google Scholar Marcelo Armendariz Andrew Welchman Hiroshi Ban Wim Vanduffel PubMed Marcelo Armendariz Andrew Welchman Hiroshi Ban Wim Vanduffel 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.