Interactions between human orbitofrontal cortex and hippocampus support model-based inference.

Area of Science:

• Neuroscience
• Cognitive Science
• Decision Making

Background:

• Internal representations of event relationships aid inference in the absence of direct experience.
• The orbitofrontal cortex (OFC) and hippocampus (HPC) are implicated in this process, but their distinct roles and interactions are unclear.

Purpose of the Study:

• To investigate the relative roles of the OFC and HPC in model-based inference.
• To examine the neural mechanisms underlying inference using a sensory preconditioning task.

Main Methods:

• Utilized a sensory preconditioning task.
• Employed pattern-based neuroimaging techniques.
• Analyzed neural activity in the OFC and HPC.

Main Results:

• Both OFC and HPC acquired associations among value-neutral cues during preconditioning.
• Value-related information was exclusively represented in the OFC during the probe test.
• Inference involved representations of cues and outcomes in the OFC, alongside increased HPC-OFC connectivity.

Conclusions:

• The OFC and HPC possess partially overlapping information representations.
• Interactions between the OFC and HPC are crucial for supporting model-based inference.
• This study elucidates the neural basis of inference through the interplay of key brain regions.