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Related Experiment Video

Updated: Apr 15, 2026

Studying Food Reward and Motivation in Humans
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Identity-specific coding of future rewards in the human orbitofrontal cortex.

James D Howard1, Jay A Gottfried1, Philippe N Tobler2

  • 1Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611; and.

Proceedings of the National Academy of Sciences of the United States of America
|April 8, 2015
PubMed
Summary

Researchers identified distinct brain regions for specific reward values. The orbitofrontal cortex (OFC) signals identity-specific rewards, while the ventromedial prefrontal cortex (vmPFC) signals general reward value, aiding adaptive decision-making.

Keywords:
associative learningmultivoxel pattern analysisolfactionreward valueventromedial prefrontal cortex

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Area of Science:

  • Neuroscience
  • Decision Science
  • Cognitive Neuroscience

Background:

  • Adaptive decision-making relies on the brain's ability to encode expected outcomes.
  • Neural mechanisms for identity-specific value signaling are not well understood.

Purpose of the Study:

  • To investigate the neural basis of identity-specific reward value representation.
  • To differentiate brain regions involved in signaling specific versus general reward values.

Main Methods:

  • Human classical conditioning using appetizing food odors with manipulated value and identity.
  • Pattern-based neuroimaging (fMRI) to observe brain activity.
  • Analysis of functional coupling between brain regions like OFC, vmPFC, piriform cortex, and amygdala.

Main Results:

  • Dissociable predictive representations of identity-specific reward were found in the orbitofrontal cortex (OFC).
  • Identity-general reward representations were identified in the ventromedial prefrontal cortex (vmPFC).
  • Reward-related functional coupling revealed parallel pathways supporting identity-specific (OFC-olfactory cortex) and general (vmPFC-amygdala) predictive signaling.

Conclusions:

  • The OFC plays a crucial role in representing identity-specific value, supporting model-based behavior.
  • Distinct neural pathways in the OFC and vmPFC underpin identity-specific and general reward signaling.
  • Understanding these mechanisms sheds light on how appetitive behaviors can be dysregulated.