Changes of mind in an attractor network of decision-making

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• dc.contributor.author Albantakis, Larissaca
• dc.contributor.author Deco, Gustavoca
• dc.date.accessioned 2016-02-16T16:36:45Z
• dc.date.available 2016-02-16T16:36:45Z
• dc.date.issued 2011
• dc.description.abstract Attractor networks successfully account for psychophysical and neurophysiological data in various decision-making tasks./nEspecially their ability to model persistent activity, a property of many neurons involved in decision-making, distinguishes/nthem from other approaches. Stable decision attractors are, however, counterintuitive to changes of mind. Here we/ndemonstrate that a biophysically-realistic attractor network with spiking neurons, in its itinerant transients towards the/nchoice attractors, can replicate changes of mind observed recently during a two-alternative random-dot motion (RDM) task./nBased on the assumption that the brain continues to evaluate available evidence after the initiation of a decision, the/nnetwork predicts neural activity during changes of mind and accurately simulates reaction times, performance and/npercentage of changes dependent on difficulty. Moreover, the model suggests a low decision threshold and high incoming/nactivity that drives the brain region involved in the decision-making process into a dynamical regime close to a bifurcation,/nwhich up to now lacked evidence for physiological relevance. Thereby, we further affirmed the general conformance of/nattractor networks with higher level neural processes and offer experimental predictions to distinguish nonlinear attractor/nfrom linear diffusion models.ca
• dc.description.sponsorship The authors were supported by the Spanish Research Project BFU2007-61710/BFI and CONSOLIDER-INGENIO 2010 Programme CSD2007-00012 (“Bilingualism and Cognitive Neuroscience”). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
• dc.format.mimetype application/pdfca
• dc.identifier.citation Albantakis L, Deco G. Changes of mind in an attractor network of decision-making. PLoS Computational Biology. 2011;7(6):1-13. DOI: 10.1371/journal.pcbi.1002086
• dc.identifier.doi http://dx.doi.org/10.1371/journal.pcbi.1002086
• dc.identifier.issn 1553-734X
• dc.identifier.uri http://hdl.handle.net/10230/25842
• dc.language.iso engca
• dc.publisher Public Library of Scienceca
• dc.relation.ispartof PLoS Computational Biology. 2011;7(6):1-13
• dc.relation.projectID info:eu-repo/grantAgreement/ES/2PN/CSD2007-00012
• dc.relation.projectID info:eu-repo/grantAgreement/ES/2PN/BFU2007-61710
• dc.rights © 2011 Albantakis, Deco. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits/nunrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ca
• dc.rights.accessRights info:eu-repo/semantics/openAccessca
• dc.rights.uri http://creativecommons.org/licenses/by/4.0/
• dc.title Changes of mind in an attractor network of decision-makingca
• dc.type info:eu-repo/semantics/articleca
• dc.type.version info:eu-repo/semantics/publishedVersionca