Neural interactions between dorsal and ventral visual subsystems while perceiving 3-D structure from 2-D motion

Abstract

Event Abstract Back to Event Neural interactions between dorsal and ventral visual subsystems while perceiving 3-D structure from 2-D motion Sunao Iwaki1* and John W. Belliveau2 1 National Institute of Advanced Industrial Science and Technology, Japan 2 Massachusetts General Hospital, United States Two-dimensional optic flow is an important cue to perceive 3D structure of objects. Recent neuroimaging studies suggest the involvement of both the ventral and the dorsal visual pathways in the perception of 3D structure from motion (3D-SFM), though the neural dynamics underlying the 3D-SFM is not fully understood. Here, we combine magnetoencephalography (MEG) and fMRI to detect the dynamic brain responses to 3D-SFM. We manipulated the coherence of randomly moving dots to create different levels of 3D perception and investigated the associated changes in brain activity. Results of the fMRI analysis were used to impose plausible constraints on the MEG inverse calculation to improve spatial resolution of the spatiotemporal activity estimates. The infero-temporal (IT), parieto-occipital (PO), and intraparietal (IP) regions showed increased neural activity at different latencies during highly coherent motion conditions in which subjects perceived a robust 3D object. Causality analysis between the estimated neural activities in these regions indicated a significant causal influence from IP to IT and from IT to PO only in conditions where subjects perceived a robust 3D object. Current results suggest that the interactions between the dorsal and ventral visual subsystems are crucial for the perception of 3D object from 2D optic flow. Conference: Biomag 2010 - 17th International Conference on Biomagnetism , Dubrovnik, Croatia, 28 Mar - 1 Apr, 2010. Presentation Type: Poster Presentation Topic: Sensory Processing and Functional Connectivity Citation: Iwaki S and Belliveau JW (2010). Neural interactions between dorsal and ventral visual subsystems while perceiving 3-D structure from 2-D motion. Front. Neurosci. Conference Abstract: Biomag 2010 - 17th International Conference on Biomagnetism . doi: 10.3389/conf.fnins.2010.06.00186 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: 29 Mar 2010; Published Online: 29 Mar 2010. * Correspondence: Sunao Iwaki, National Institute of Advanced Industrial Science and Technology, Osaka, Japan, s.iwaki@aist.go.jp 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 Sunao Iwaki John W Belliveau Google Sunao Iwaki John W Belliveau Google Scholar Sunao Iwaki John W Belliveau PubMed Sunao Iwaki John W Belliveau 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.