Cooperative phenomena in motion binding

Abstract

Event Abstract Back to Event Cooperative phenomena in motion binding Guillermo Aguilar1*, Maurizio Mattia2, Paolo Del Giudice2, Alexander Pastukhov1 and Jochen Braun1* 1 Otto-von-Guericke Universität Magdeburg, Kognitionsbiologie (KoBi), Institut für Biologie, Germany 2 Istituto Superiore di Sanità, Italy Many aspects of visual perception are characterized by ‘cooperative behavior’ such as order-disorder transitions, multi-stable states, and ‘hysteresis' (Williams, Phillips & Sekuler, 1986), presumably reflecting recurrent excitation and inhibition within the underlying neural populations (Buckthought, Kim & Wilson, 2008). We have studied hysteresis in the transition between ordered and disordered percepts induced by random-dot-kinematograms (RDK). Our aim was to establish the probability and dynamics of order-disorder transitions and to characterize their dependence on the number of display elements (dots). Six observers viewed continuous RDK for 5 s – during which the fraction of orderly dots varied unpredictably (low-pass-filtered random walk) – reporting their initial and final percepts (orderly/disorderly). Orderly dots produced a coherent motion flow (either clockwise or anti-clockwise, converging or diverging spirals, with varying angular velocity). We obtained pronounced hysteresis for ‘orderly fractions' from 0.4 to 0.6. Random walks terminating at 0.5 consistently yielded different percepts, revealing a significant influence of the orderly fraction up to 2 s prior to termination. Reverse correlation showed the characteristic time-constant to be approximately 0.4 s. We introduce a novel method for characterizing the cooperative dynamics of order-disorder transitions in motion binding. These observations provide powerful constraints for abstract neural models based on discrete stochastic integration (Braun & Mattia, 2010). References Williams, D., Phillips, G., & Sekuler, R. (1986). Hysteresis in the perception of motion direction as evidence for neural cooperativity. Nature, 324(6094), 253-5. Buckthought, A., Kim, J., & Wilson, H. R. (2008). Hysteresis effects in stereopsis and binocular rivalry. Vision research, 48(6), 819-30. Braun, J., & Mattia, M. (2010). Attractors and noise: twin drivers of decisions and multistability. NeuroImage, 52(3), 740-51. Keywords: motion binding, multistability, percetual hysteresis, stochastic integration Conference: Bernstein Conference 2012, Munich, Germany, 12 Sep - 14 Sep, 2012. Presentation Type: Poster Topic: Sensory processing and perception Citation: Aguilar G, Mattia M, Del Giudice P, Pastukhov A and Braun J (2012). Cooperative phenomena in motion binding. Front. Comput. Neurosci. Conference Abstract: Bernstein Conference 2012. doi: 10.3389/conf.fncom.2012.55.00167 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: 11 May 2012; Published Online: 12 Sep 2012. * Correspondence: Mr. Guillermo Aguilar, Otto-von-Guericke Universität Magdeburg, Kognitionsbiologie (KoBi), Institut für Biologie, Magdeburg, 39120, Germany, gmo.aguilar.c@gmail.com Prof. Jochen Braun, Otto-von-Guericke Universität Magdeburg, Kognitionsbiologie (KoBi), Institut für Biologie, Magdeburg, 39120, Germany, jochen.braun@ovgu.de 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 Guillermo Aguilar Maurizio Mattia Paolo Del Giudice Alexander Pastukhov Jochen Braun Google Guillermo Aguilar Maurizio Mattia Paolo Del Giudice Alexander Pastukhov Jochen Braun Google Scholar Guillermo Aguilar Maurizio Mattia Paolo Del Giudice Alexander Pastukhov Jochen Braun PubMed Guillermo Aguilar Maurizio Mattia Paolo Del Giudice Alexander Pastukhov Jochen Braun 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.