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Related Experiment Videos

Risk-sensitive neurons in macaque posterior cingulate cortex.

Allison N McCoy1, Michael L Platt

  • 1Department of Neurobiology, Duke University Medical Center, Box 3209, Durham, North Carolina 27710, USA.

Nature Neuroscience
|August 24, 2005
PubMed
Summary
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Monkeys preferred risky choices in a gambling task. Neuronal activity in the posterior cingulate cortex (CGp) increased with risk, suggesting it signals subjective preferences guiding attention.

Area of Science:

  • Neuroscience
  • Decision-making
  • Behavioral Economics

Background:

  • Individuals exhibit varied responses to uncertain rewards.
  • Neural mechanisms underlying subjective risk preferences remain largely unexplored.

Purpose of the Study:

  • Investigate the neural basis of subjective risk preferences.
  • Determine the role of the posterior cingulate cortex (CGp) in guiding choices under risk.

Main Methods:

  • Monkeys performed a visual gambling task with varying reward uncertainty.
  • Neuronal activity in the CGp was recorded during decision-making.
  • Choice behavior and neural responses were analyzed in relation to reward risk and subjective salience.

Main Results:

Related Experiment Videos

  • Monkeys consistently preferred targets with higher reward uncertainty (riskier choices).
  • CGp neuronal activity significantly increased with greater risk and scaled with the degree of risk.
  • CGp activation correlated more strongly with the subjective salience of a chosen target than its objective value.

Conclusions:

  • The posterior cingulate cortex (CGp) plays a crucial role in processing subjective risk preferences.
  • CGp activity appears to signal the subjective importance of options, guiding attention and choice behavior.
  • These findings advance our understanding of the neural computations underlying risky decision-making.