Optimality, stochasticity, and variability in motor behavior.

Journal of Computational Neuroscience
Emmanuel GuigonMichel Desmurget

Abstract

Recent theories of motor control have proposed that the nervous system acts as a stochastically optimal controller, i.e. it plans and executes motor behaviors taking into account the nature and statistics of noise. Detrimental effects of noise are converted into a principled way of controlling movements. Attractive aspects of such theories are their ability to explain not only characteristic features of single motor acts, but also statistical properties of repeated actions. Here, we present a critical analysis of stochastic optimality in motor control which reveals several difficulties with this hypothesis. We show that stochastic control may not be necessary to explain the stochastic nature of motor behavior, and we propose an alternative framework, based on the action of a deterministic controller coupled with an optimal state estimator, which relieves drawbacks of stochastic optimality and appropriately explains movement variability.

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Citations

Jul 5, 2012·Journal of Biomechanical Engineering·Hung P Nguyen, Jonathan B Dingwell
Oct 12, 2012·PLoS Computational Biology·Lionel Rigoux, Emmanuel Guigon
Nov 2, 2011·Journal of Computational Neuroscience·Roberto C Sotero, Amir Shmuel
Jun 7, 2011·Experimental Brain Research·Domenico CampoloEtienne Burdet
Dec 24, 2015·Frontiers in Computational Neuroscience·Naohiro TakemuraToshio Inui
Dec 29, 2009·Neuroscience Letters·Rajiv Ranganathan, Karl M Newell
Feb 19, 2008·The European Journal of Neuroscience·Emmanuel GuigonMichel Desmurget
Nov 12, 2013·Human Movement Science·Joseph P Cusumano, Jonathan B Dingwell
May 20, 2015·Current Opinion in Neurobiology·John F Houde, Edward F Chang
Jul 16, 2016·Proceedings of the National Academy of Sciences of the United States of America·Dongsung Huh, Terrence J Sejnowski
Jan 17, 2019·Journal of Neurophysiology·Emmanuel GuigonAgnès Roby-Brami
Jun 12, 2010·Journal of Neurophysiology·Emmanuel Guigon
Jul 8, 2011·Journal of Neurophysiology·Bastien BerretThierry Pozzo
Feb 29, 2020·PLoS Computational Biology·Bastien Berret, Frédéric Jean
Nov 19, 2015·Frontiers in Neuroscience·Elizaveta OkorokovaAlex Ossadtchi
Jan 31, 2018·Frontiers in Human Neuroscience·Luka PeternelJan Babič
Oct 4, 2012·Computer Methods in Biomechanics and Biomedical Engineering·D Marin, O Sigaud

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