Evaluating self-generated decisions in frontal pole cortex of monkeys.
Satoshi Tsujimoto1, Aldo Genovesio, Steven P Wise
1Laboratory of Systems Neuroscience, National Institute of Mental Health, US National Institutes of Health, Bethesda, Maryland, USA. tsujimoto@ruby.kobe-u.ac.jp
Nature Neuroscience
|December 8, 2009
Summary
The frontal pole cortex (FPC) monitors decisions, particularly those self-generated using working memory. This brain region
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Evolutionary Neuroscience
Background:
- The frontal pole cortex (FPC) shows significant expansion in human evolution.
- The precise function of the FPC in monkeys and humans remains largely unknown.
Purpose of the Study:
- To investigate the functional role of the frontal pole cortex (FPC) in decision-making processes.
- To understand how FPC activity relates to self-generated decisions versus externally instructed choices.
Main Methods:
- Recorded single-cell activity in the FPC of monkeys performing a decision-making task.
- Utilized a 'stay' or 'shift' cue paradigm with delayed feedback.
- Employed a control task involving working memory and sensory cue integration for self-generated decisions.
Main Results:
- FPC cells encoded decisions later in the trial, specifically as feedback approached, not at the moment of decision.
- Decision coding in FPC persisted until feedback only when monkeys self-generated decisions by combining working memory and sensory cues.
- FPC activity differed based on whether decisions were self-generated or based on simple trial-by-trial instructions.
Conclusions:
- The frontal pole cortex (FPC) is implicated in monitoring and evaluating decisions.
- The FPC's role in evaluating self-generated decisions may explain its evolutionary expansion in humans.
- This suggests a specialized function for FPC in complex, internally driven cognitive processes.
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