AI Insight
Researchers demonstrated that the lateral orbitofrontal cortex (lOFC) generates specific expectations about the identity of rewards (such as different food types) in response to environmental cues, and these expectations directly influence subsequent decision-making and choices. Using functional MRI pattern analysis in humans performing a novel behavioral task, they found that the nucleus accumbens amplifies these lOFC reward expectations, which then guide action representations in the dorsal anterior cingulate cortex. This provides a neural mechanism connecting how the brain represents what specific reward it expects with how it motivates goal-directed behavior to obtain that reward.
Why it matters
This research bridges theoretical gaps in understanding how the brain makes real-world decisions based on specific desired outcomes rather than abstract reward values. The findings could inform treatments for disorders involving impaired decision-making, such as addiction or compulsive behaviors, by identifying the specific neural circuits that link reward expectations to actions.
Understand the Science
by Phillip P. Witkowski, Noelle Henein, Nicole Moussa, Geoffrey Schoenbaum, Thorsten Kahnt
Real-life decisions are typically directed toward specific types of rewards (e.g., a slice of pizza or a bowl of pasta), but reward identity is often neglected in neuroeconomic theories of decision-making. Previous research has shown that the lateral orbitofrontal cortex (lOFC) represents the specific rewards predicted by environmental cues. However, whether and how these expectations influence decision-making remains an open question. To address these questions in humans, we developed a novel behavioral task in which Pavlovian cues associated with specific rewards are presented before participants can make decisions to forage these rewards. Using pattern-based analysis of functional magnetic resonance imaging data, we show that cues predicting distinct reward types evoke identity-specific expectations in lOFC, which in turn predict subsequent choices. This effect is amplified by activity in the nucleus accumbens, which enhances the influence of lOFC reward expectations on action representations in the dorsal anterior cingulate cortex. These results connect representational and motivational accounts of decision-making, highlighting the neural mechanism by which expectations about reward identity guide goal-directed behavior.
Source: Identity-specific reward expectations in orbitofrontal cortex guide goal-directed choices