To explore sex differences in brain activation related to risky decision-making and their association with problematic substance use in adolescents with externalizing disorders.
Key Findings:
Higher modulated brain activation in the right nucleus accumbens during risky decision-making was linked to a lower hazard of problematic substance use in females (HR = 0.68, 95% CI [0.49, 0.94], p = 0.01).
In males, higher unmodulated activation in the right nucleus accumbens was associated with lower hazard of problematic substance use (HR = 0.60, 95% CI [0.37, 0.97], p = 0.03).
In females, higher unmodulated activation in the right subgenual anterior cingulate cortex was also linked to a lower hazard of problematic substance use (HR = 0.49, 95% CI [0.24, 0.97], p = 0.03).
Interpretation:
The study highlights that typical risk signaling in the reward-processing network may protect against substance use, indicating the need for sex-specific interventions for both males and females with externalizing disorders.
Limitations:
The sample size may limit the generalizability of findings.
The study focuses on drug-naive adolescents, which may not represent all youth with externalizing disorders.
Potential confounding variables may not have been controlled for in the study.
Conclusion:
Understanding sex-specific neural mechanisms in substance use risk is crucial for developing targeted interventions for high-risk adolescents with externalizing disorders.
