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Neuronal variability in orbitofrontal cortex during economic decisions.

Katherine E Conen1, Camillo Padoa-Schioppa2

  • 1Department of Anatomy and Neurobiology, Washington University in St. Louis, St. Louis, Missouri;

Journal of Neurophysiology
|June 19, 2015
PubMed
Summary
This summary is machine-generated.

Neuroeconomic models link economic decisions to orbitofrontal cortex (OFC) cell activity. This study shows that noise correlations and choice probabilities in the OFC support this link, validating offer value cells' role.

Keywords:
neoroeconomicssubjective valuevalue-based decision

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Area of Science:

  • Neuroscience
  • Neuroeconomics
  • Computational Neuroscience

Background:

  • Neuroeconomic models propose that economic decisions stem from offer value cell activity in the orbitofrontal cortex (OFC).
  • Testing this hypothesis is challenging due to small choice probabilities (CPs) reflecting both individual cell contribution and population noise correlations.

Purpose of the Study:

  • To investigate neuronal variability in the OFC during economic decisions in rhesus monkeys.
  • To determine if noise correlations and CPs in the OFC support the role of offer value cells in economic decision-making.

Main Methods:

  • Measured neuronal variability, noise correlations, and choice probabilities (CPs) in the OFC of rhesus monkeys during economic decisions.
  • Utilized a mathematical framework relating CPs, noise correlations, and readout weights (Haefner et al., 2013).
  • Performed simulation analyses using experimental data and the derived mathematical relation.

Main Results:

  • OFC noise correlations exhibited similar structure but lower strength compared to sensory areas.
  • Individual cell activity variability was high, comparable to other cortical regions.
  • Simulations demonstrated that OFC noise correlations and a plausible readout of offer value cells could reproduce experimental CPs.

Conclusions:

  • The findings support the hypothesis that economic decisions are primarily driven by the activity of offer value cells in the OFC.
  • The interplay between noise correlations and CPs provides quantitative insights into neuronal population contributions to economic choices.