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Rapid Visuomotor Responses Reflect Value-Based Decisions.

Timothy J Carroll1, Daniel McNamee2, James N Ingram2,3

  • 1Centre for Sensorimotor Performance, School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane 4072, Queensland, Australia, timothy.carroll@uq.edu.au.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 10, 2019
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Summary
This summary is machine-generated.

Rapid motor responses to movement perturbations reflect high-level decision-making. The brain adjusts feedback control gains to favor task success, integrating value-based computations into involuntary motor actions for adaptive movement.

Keywords:
decision-makinginvoluntary movementreflexvalue-based choice

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Area of Science:

  • Neuroscience
  • Motor Control
  • Decision-Making

Background:

  • Sensorimotor control theories propose the brain sets time-varying feedback gains to transform sensory information into motor commands.
  • Value-based decision-making influences cognitive processes by considering probabilities and reward sizes of potential options.

Purpose of the Study:

  • To investigate if rapid, involuntary motor responses to visual feedback perturbations reflect high-level value-based decision-making computations.
  • To determine if low-level feedback control loops are influenced by reward value and probability.

Main Methods:

  • Three experiments were conducted with human participants performing reaching movements.
  • Target values were manipulated by altering reward distributions, target probabilities, or both.
  • Visuomotor response data to movement perturbations were analyzed.

Main Results:

  • Rapid and involuntary feedback responses to movement perturbations were significantly influenced by the relative value of targets.
  • A statistical model incorporating relative value and risk sensitivity best explained the visuomotor response data.
  • Feedback control policies were biased towards task success, sometimes at the expense of maximum extrinsic reward.

Conclusions:

  • Rapid motor feedback responses during reaching movements are modulated by the relative probabilities and rewards associated with different target options.
  • Low-order sensorimotor control processes evaluate evolving sensory evidence and initiate responses based on potential reward.
  • The brain specifies feedback control gains that enable adaptive, value-driven responses in low-level motor areas, integrating decision-making with motor execution.