The neural code of reward anticipation in human orbitofrontal cortex

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Decision Science

Background:

• Optimal decision-making relies on accurate anticipation of behavioral outcomes.
• Understanding how the brain represents these anticipated outcomes is crucial.
• Orbitofrontal cortex (OFC) reward coding differs between single-cell and functional MRI (fMRI) studies.

Purpose of the Study:

• To investigate how reward value is represented in the human OFC using fMRI.
• To reconcile discrepancies between electrophysiological and fMRI findings on OFC reward coding.
• To explore the relationship between value representation similarity and behavioral guidance.

Main Methods:

• Multivariate pattern classification applied to fMRI data.
• Analysis of fMRI patterns representing reward value of sensory cues.
• Comparison of fMRI patterns during reward anticipation and receipt.

Main Results:

• Reward value of sensory cues was decodable from distributed fMRI patterns in the OFC.
• fMRI patterns for anticipated reward values resemble those during actual reward receipt.
• The similarity between anticipated and received reward patterns correlated with behavioral performance.

Conclusions:

• OFC reward representations are distributed, aligning human fMRI data with animal electrophysiology.
• Value representations in the OFC are consistent across anticipation and receipt.
• Distributed OFC value coding supports flexible, value-guided behavior.