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• W4230996870 abstract "Event Abstract Back to Event Long-range coupling of prefrontal cortex and visual (MT) or polysensory (STP) cortical areas in motion perception Lucia M. Vaina1, 2*, Finnegan Calabro1, Fa-Hsuan Lin2 and Matti Hamalainen3 1 Boston University, United States 2 Harvard University, United States 3 Massachusetts General Hospital, United States To investigate how, where and when moving auditory cues interact with the perception of object-motion during self-motion, we conducted psychophysical, and MEG experiments in which the subjects viewed nine textured objects during simulated forward self-motion. On each trial, one object was randomly assigned its own looming motion within the scene. Subjects reported which of four labeled objects had independent motion within the scene in two conditions: (1) visual information only and (2) with additional auditory cue. In psychophysics, observers performed slightly better in the presence of an auditory cue moving in the same direction with the object target (p=0.003, t=4.18, df=8, min 1.2%, and max 8.1). When the auditory cue was static, uninformative, it had not impact on performance. In cortically-constrained MEG source estimates, comparison of the two conditions showed: (i) MT (middle temporal area) activity similar across conditions; (ii) additional activity in the auditory cue condition ventral to MT late after the stimulus presentation; (iii) with the auditory cue, early activity at the right auditory cortex (AC) together with STP (superior temporal polysensory area), (iv) different time courses of these two activities with STP signals later in the epoch together with frontal activity in the right hemisphere, (v) stronger activity in PPC (posterior parietal cortex) in the visual-only condition than in the auditory-cue condition. In addition, Dynamic Granger Causality analysis among cortical regions showed for the auditory cues condition a strong connection of the AC with STP but not with MT suggesting binding of visual and auditory information at STP. Also, while in the visual-only condition PFC is connected with MT, in the auditory-cue condition PFC (prefrontal cortex) is connected to STP. These results indicate that PFC allocates attention to the “object” as a whole, in STP to a moving visual-auditory object, and in MT to a moving visual object. 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: Vaina LM, Calabro F, Lin F and Hamalainen M (2010). Long-range coupling of prefrontal cortex and visual (MT) or polysensory (STP) cortical areas in motion perception. Front. Neurosci. Conference Abstract: Biomag 2010 - 17th International Conference on Biomagnetism . doi: 10.3389/conf.fnins.2010.06.00212 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: 30 Mar 2010; Published Online: 30 Mar 2010. * Correspondence: Lucia M Vaina, Boston University, Boston, United States, vaina@bu.edu 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 Lucia M Vaina Finnegan Calabro Fa-Hsuan Lin Matti Hamalainen Google Lucia M Vaina Finnegan Calabro Fa-Hsuan Lin Matti Hamalainen Google Scholar Lucia M Vaina Finnegan Calabro Fa-Hsuan Lin Matti Hamalainen PubMed Lucia M Vaina Finnegan Calabro Fa-Hsuan Lin Matti Hamalainen 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." @default.
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• W4230996870 title "Long-range coupling of prefrontal cortex and visual (MT) or polysensory (STP) cortical areas in motion perception" @default.
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