Event Abstract Back to Event Visuomotor adaptation generalizes partially according to an eye-centred coordinate frame Eugene Poh1, Guy Wallis1, Stephan Riek1, Aymar De Rugy1, 2 and Timothy Carroll1* 1 The University of Queensland, Centre for Sensorimotor Neuroscience, School of Human Movement Studies, Australia 2 Université Bordeaux Segalen, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, France The nature of the internal maps between vision and motor commands can be inferred from the generalization of learned distortions between visual target direction and direction of hand motion. Previous reports of generalization across different limb postures appear consistent with a stored representation of the distortion defined in extrinsic coordinates. However, because manipulation of limb posture does not dissociate external space relative to the body from location in the visual field, it is possible that new visuomotor maps are partly represented in eye-centred coordinates. We investigated this possibility by measuring generalization between different head positions during an isometric aiming task. Subjects adapted to a 30º visual rotation (120 trials) while aiming to a single target direction that aligned with the sagittal axis of the head when the head was rolled 35º from midline. Generalization was assessed to seven targets with no feedback (every 30? from 0-180?) in the adapted head position, and also in a test position with the head rolled by 70? in the opposite direction. In the test head position, the location of the trained target differed in eye and body-centred coordinates by 60?. Thus, if visuomotor maps are represented in eye-centred coordinates, generalization should have shifted with the head (i.e. by 60? in Cartesian coordinates relative to the body). In contrast, if visuomotor maps are represented in body-centred coordinates, generalization should remain constant in Cartesian space irrespective of head position. We measured a 17.7º (p<0.05) shift in generalization away from the Cartesian training direction and toward the new orientation of the head in the test position. This partial shift of the generalization in eye-based coordinates indicates that visuomotor maps are encoded in neural circuits associated with both eye- and body-centred movement representations. Keywords: adaptation, motor learning, generalization, Coordinate frames, visuomotor rotation Conference: XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014. Presentation Type: Poster Topic: Motor Behaviour Citation: Poh E, Wallis G, Riek S, De Rugy A and Carroll T (2015). Visuomotor adaptation generalizes partially according to an eye-centred coordinate frame. Conference Abstract: XII International Conference on Cognitive Neuroscience (ICON-XII). doi: 10.3389/conf.fnhum.2015.217.00317 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: 19 Feb 2015; Published Online: 24 Apr 2015. * Correspondence: Dr. Timothy Carroll, The University of Queensland, Centre for Sensorimotor Neuroscience, School of Human Movement Studies, Brisbane, Australia, timothy.carroll@uq.edu.au 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 Eugene Poh Guy Wallis Stephan Riek Aymar De Rugy Timothy Carroll Google Eugene Poh Guy Wallis Stephan Riek Aymar De Rugy Timothy Carroll Google Scholar Eugene Poh Guy Wallis Stephan Riek Aymar De Rugy Timothy Carroll PubMed Eugene Poh Guy Wallis Stephan Riek Aymar De Rugy Timothy Carroll 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.