Prediction of exploratory decision-making from single-trial topographic EEG analyses

Abstract

Event Abstract Back to Event Prediction of exploratory decision-making from single-trial topographic EEG analyses Athina Tzovara1, 2*, Micah M. Murray1, 2, Nicolas Bourdaud3, Ricardo Chavarriaga3, José Del R. Millán3 and Marzia De Lucia1, 2 1 Center for Biomedical Imaging, University Hospital, Switzerland 2 University of Lausanne, Switzerland 3 Chair on Non-Invasive Brain-Computer Interface, Ecole Polytechnique Fédéral de Lausanne, Switzerland Decision-making in an uncertain environment is driven by two major needs: exploring the environment to gather information or exploiting acquired knowledge to maximize reward. The processes underlying exploratory decision-making have been mainly studied by means of functional magnetic resonance imaging leaving their temporal aspects under-explored. Here, using a well-known gambling paradigm in reinforcement learning we aim at detecting when in time, at the single-trial level, the brain generators responsible for these decisions have been sufficiently activated to lead to the following decision. Our analyses, following a classification scheme, are based on extracting time-unlocked voltage topographies during reward presentation and using them to predict decisions made on the next trial. Classification accuracy, measured as the area under the Receiver Operator’s Characteristic curve was on average across 7 subjects 0.65±0.02. The crucial time period, over which enough evidence was accumulated to accurately make this prediction, started from the display of the previous reward and lasted on average across trials and subjects up to 570±18 ms post-stimulus. On an individual subject basis, distributed source estimations were performed on the extracted topographies to statistically evaluate the neural correlates of decision making. For trials leading to exploration, there was significantly higher activity in dorsolateral prefrontal cortex and in the right parietal supramarginal gyrus; areas responsible for task-switching and modulating behavior under risk and deduction. No area was more active during exploitation. We show for the first time the temporal evolution of differential patterns of brain activation in an exploratory decision-making task on a single-trial basis. Keywords: decision-making, EEG Conference: XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011. Presentation Type: Poster Presentation Topic: Poster Sessions: Decision Making, Reward Processing & Response Selection Citation: Tzovara A, Murray MM, Bourdaud N, Chavarriaga R, Millán J and De Lucia M (2011). Prediction of exploratory decision-making from single-trial topographic EEG analyses. Conference Abstract: XI International Conference on Cognitive Neuroscience (ICON XI). doi: 10.3389/conf.fnhum.2011.207.00371 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 2011; Published Online: 28 Nov 2011. * Correspondence: Dr. Athina Tzovara, Center for Biomedical Imaging, University Hospital, Lausanne, Switzerland, athina.tz@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 Athina Tzovara Micah M Murray Nicolas Bourdaud Ricardo Chavarriaga José Del R. Millán Marzia De Lucia Google Athina Tzovara Micah M Murray Nicolas Bourdaud Ricardo Chavarriaga José Del R. Millán Marzia De Lucia Google Scholar Athina Tzovara Micah M Murray Nicolas Bourdaud Ricardo Chavarriaga José Del R. Millán Marzia De Lucia PubMed Athina Tzovara Micah M Murray Nicolas Bourdaud Ricardo Chavarriaga José Del R. Millán Marzia De Lucia 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.