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Post-decision processing in primate prefrontal cortex influences subsequent choices on an auditory decision-making

Joji Tsunada1,2, Yale Cohen1,3,4, Joshua I Gold3

  • 1Department of Otorhinolaryngology, University of Pennsylvania, Philadelphia, United States.

Elife
|June 7, 2019
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Neurons in the ventrolateral prefrontal cortex (vlPFC) evaluate past auditory decisions and influence future choices. This brain region

Keywords:
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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Decision Making

Background:

  • Perceptual decisions are influenced by ongoing evaluation and adjustment processes.
  • The neural basis of these across-decision processes, especially in auditory systems, remains unclear.

Purpose of the Study:

  • To investigate the role of ventrolateral prefrontal cortex (vlPFC) neurons in auditory decision-making.
  • To understand how vlPFC activity influences current and future decisions.

Main Methods:

  • Measured and manipulated choice-selective neuronal activity in the vlPFC of monkeys during auditory frequency discrimination tasks.
  • Used electrical microstimulation to probe the causal role of vlPFC in decision processes.

Main Results:

  • vlPFC activity did not strongly modulate during decision formation but encoded sensory evidence, choice, and outcome post-commitment.
  • Post-commitment vlPFC activity predicted subsequent trial choice biases.
  • Microstimulation of vlPFC affected subsequent decisions, not current ones.

Conclusions:

  • Distributed, post-commitment representations in the vlPFC are crucial for evaluating past decisions.
  • These vlPFC representations causally influence future choices, demonstrating a role in adaptive decision-making.