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Monkey orbitofrontal cortex encodes response choices near feedback time.

Satoshi Tsujimoto1, Aldo Genovesio, Steven P Wise

  • 1Laboratory of Systems Neuroscience, National Institute of Mental Health-National Institutes of Health, Bethesda, Maryland 20892-4401, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|February 27, 2009
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Summary
This summary is machine-generated.

The dorsolateral prefrontal cortex (PFdl) and orbital prefrontal cortex (PFo) in primates show distinct roles in guiding behavior. PFdl integrates response and outcome, while PFo monitors responses independently of outcomes.

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Area of Science:

  • Neuroscience
  • Primate Cognition

Background:

  • The primate prefrontal cortex is crucial for stimulus-guided behavior.
  • Functional specializations within the prefrontal cortex remain unclear.

Purpose of the Study:

  • To investigate functional specializations between the dorsolateral prefrontal cortex (PFdl) and orbital prefrontal cortex (PFo).
  • To contrast neuronal activity in PFdl and PFo during a cued response task.

Main Methods:

  • Recorded neuronal activity in rhesus monkeys performing a cued saccade target selection task.
  • Task involved repeating or changing responses based on visual cues.
  • Responses were followed by reward or visual feedback.

Main Results:

  • PFo neurons encoded responses near feedback time, unlike previous findings.
  • PFdl neurons encoded previous and planned responses.
  • PFdl neurons distinguished between rewarded and unrewarded responses.
  • PFo neurons encoded chosen responses irrespective of reward outcome.

Conclusions:

  • PFdl and PFo exhibit different contributions to response knowledge.
  • PFo utilizes an outcome-independent signal for response monitoring at feedback.
  • PFdl integrates both response and outcome information.