Adolescent Decision-Making Under Risk: Neural Correlates and Sex Differences

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Adolescent risk-taking is common and has significant health and social impacts.
• Understanding the neural basis of decision-making in adolescents is crucial.

Purpose of the Study:

• To identify brain regions involved in risky vs. risk-averse decisions and outcome evaluation in adolescents.
• To explore how the level of risk influences neural activity.
• To investigate sex differences in neural responses during decision-making.

Main Methods:

• Utilized the Balloon Analog Risk Task (BART) in a large sample of adolescents (n=256).
• Analyzed neural activity in cortical and subcortical regions, treating risk level as a parametric modulator.
• Examined brain responses to both risky and risk-averse decisions, as well as positive and negative outcomes.

Main Results:

• Risky decisions activated salience, dorsal attention, and frontoparietal networks. Only the insula showed sensitivity to increasing risk levels.
• Risk-averse decisions also involved these networks, correlating with risk levels.
• Negative outcomes, compared to positive outcomes, elicited greater activation in areas including the insula, orbitofrontal cortex, and anterior cingulate cortex.
• Females showed greater activation in some regions associated with negative outcomes.

Conclusions:

• Accurate neural representation of increasing risk levels predicts safer decisions in adolescents.
• Reward-related processes appear to play a less significant role in safe decision-making compared to risk representation.
• Sex differences exist in neural processing of negative outcomes during decision-making.