Neuroscience Seminar : A representation of effort in decision making and movement control
Abstract: Decisions depend on the reward at stake and the effort required. However, these same variables influence the vigor of the ensuing movement, suggesting that factors that affect evaluation of action also influence performance of the selected action. In this talk, I will describe a mathematical framework that links decision-making with motor control. Each action has a utility, i.e. cost function, that combines the reward at stake with its effort requirements, both discounted as a hyperbolic function of time. The critical assumption of this model is to represent effort via the metabolic energy expended to produce the movement. This energetic representation describes a parameterization of effort as a function of movement duration, mass of the limb, distance, and force, which we confirmed experimentally in reaching movements. Our main result is…
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