Reversal learning strategy in adolescence is associated with prefrontal cortex activation

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Adolescence is a crucial period for the development of cognitive control and executive functions.
• Understanding the neural mechanisms underlying these changes is vital for addressing behavioral development.

Purpose of the Study:

• To investigate the neural correlates of learning from reward prediction errors during adolescence.
• To examine how individual differences in learning strategies relate to behavioral outcomes and pubertal development.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to study 85 adolescents performing a reversal learning task.
• Behavioral data were analyzed using a reinforcement learning model to derive individual parameters.
• Participants were grouped based on their expectation updating strategies (chosen vs. unchosen stimulus).

Main Results:

• Dorsolateral striatal activity covaried with reward prediction errors (PE).
• Individuals relying less on task structure showed reduced prefrontal activation compared to those who relied more on task structure.
• Exploratory analysis linked PE-related activity in prefrontal areas, insula, and anterior cingulate to pubertal development.

Conclusions:

• The prefrontal cortex plays a significant role in flexible, goal-directed behavioral control during adolescence.
• Individual learning strategies and their neural underpinnings are associated with behavioral differences and developmental stage.