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A computational theory for the production of limb movements

Abstract : Motor control is a fundamental process that underlies all voluntary behavioral responses. Several different theories based on different principles (task dynamics, equilibrium-point theory, passive-motion paradigm, active inference, optimal control) account for specific aspects of how actions are produced, but fail to provide a unified view on this problem. Here we propose a concise theory of motor control based on three principles: optimal feedback control, control with a receding time horizon, and task representation by a series of via-points updated at fixed frequency. By construction, the theory provides a suitable solution to the degrees-of-freedom problem, i.e. trajectory formation in the presence of redundancies and noise. We show through computer simulations that the theory also explains the production of discrete, continuous, rhythmic and temporally-constrained movements, and their parametric and statistical properties (scaling laws, power laws, speed/accuracy tradeoffs). The theory has no free parameters and only limited variations in its implementation details and in the nature of noise are necessary to guarantee its explanatory power.
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https://hal.archives-ouvertes.fr/hal-03276320
Contributor : Emmanuel Guigon Connect in order to contact the contributor
Submitted on : Monday, July 19, 2021 - 2:28:24 PM
Last modification on : Sunday, June 26, 2022 - 3:11:02 AM

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Emmanuel Guigon. A computational theory for the production of limb movements. Psychological Review, American Psychological Association, In press, ⟨10.1037/rev0000323⟩. ⟨hal-03276320v2⟩

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