Identity-specific reward expectations in orbitofrontal cortex guide goal-directed choices

Area of Science:

• Neuroscience
• Cognitive Science
• Decision Science

Background:

• Real-life decisions involve specific rewards, yet reward identity is often overlooked in neuroeconomic theories.
• The lateral orbitofrontal cortex (lOFC) is known to represent specific rewards predicted by cues.
• The influence of these reward expectations on decision-making remains unclear.

Purpose of the Study:

• To investigate how identity-specific reward expectations, signaled by environmental cues, influence human decision-making.
• To explore the neural mechanisms underlying the integration of reward identity information into choice behavior.

Main Methods:

• Developed a novel behavioral task involving Pavlovian cues linked to specific rewards presented before decision-making.
• Utilized pattern-based analysis of functional magnetic resonance imaging (fMRI) data to examine brain activity.
• Analyzed the interplay between the lOFC, nucleus accumbens, and dorsal anterior cingulate cortex (dACC).

Main Results:

• Cues predicting distinct reward types elicited identity-specific expectations in the lOFC.
• These lOFC expectations significantly predicted subsequent reward-seeking choices.
• Nucleus accumbens activity amplified the influence of lOFC expectations on action representations in the dACC.

Conclusions:

• Demonstrated that identity-specific reward expectations in the lOFC play a crucial role in guiding goal-directed behavior.
• Connected representational and motivational aspects of decision-making through neural mechanisms.
• Highlighted the neural pathway involving lOFC, nucleus accumbens, and dACC in translating reward expectations into action.