Sex differences in Cingulo-Opercular activation during risky decision-making in youth with externalizing disorders

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Risky decision-making deficits are linked to unsafe behaviors.
• Sex differences in decision-making are understudied in at-risk youth with externalizing disorders.
• Externalizing pathology in males is associated with riskier decisions, but patterns in females are less understood.

Purpose of the Study:

• Investigate sex differences in the neurobiology of risky decision-making in at-risk adolescents.
• Identify sex-specific vulnerabilities for risky behaviors.
• Examine brain activation patterns during risk assessment.

Main Methods:

• 168 adolescents completed the Balloon Analog Risk Task during functional magnetic resonance imaging (fMRI).
• Participants were divided into four groups: externalizing males, externalizing females, control males, and control females.
• fMRI data analyzed to compare brain activation across groups during decision-making.

Main Results:

• Externalizing males exhibited greater activation in the right dorsomedial prefrontal cortex/dorsal anterior cingulate cortex.
• This heightened activation correlated with increased risk-taking as the probability of balloon explosion rose.
• No significant differences observed in other groups compared to externalizing males.

Conclusions:

• Findings reveal significant sex differences in the neurobiology of risky decision-making in youth with externalizing psychopathology.
• The cingulo-opercular network's role in cognitive control and impulse inhibition is implicated.
• Understanding these sex-specific neural patterns is crucial for developing targeted interventions to prevent risky behaviors.