Examining cognitive control and reward interactions in adolescent externalizing symptoms

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychopathology

Background:

• Adolescence involves significant brain development, particularly in reward systems, influencing behavior and control.
• Disruptions in behavioral control, especially concerning rewards, may contribute to adolescent mental health issues like externalizing psychopathology.
• The interplay between cognitive control and reward learning in adolescent externalizing symptoms remains understudied.

Purpose of the Study:

• To investigate the relationship between cognitive control, reward learning, and externalizing symptoms in adolescents.
• To identify neural markers associated with inhibitory control over previously rewarded stimuli in this population.
• To utilize a Research Domain Criteria (RDoC) framework for a dimensional approach to psychopathology.

Main Methods:

• A cohort of 61 typically developing adolescents completed a task integrating Monetary Incentive Delay and Go-No-Go paradigms.
• Behavioral and neuroimaging (fMRI) data were collected during response inhibition to cues with and without reward history.
• Statistical analyses examined associations between externalizing symptom severity and neural activation patterns.

Main Results:

• A positive association was found between higher externalizing symptom scores and increased activation in the left middle frontal gyrus.
• This activation occurred specifically during response inhibition to cues previously associated with reward.
• The observed neural associations remained significant after controlling for internalizing symptoms and inhibition of neutral cues.

Conclusions:

• Inhibitory control over previously rewarded stimuli may serve as a key neural marker for externalizing psychopathology in adolescence.
• Difficulties in adapting behavior based on reward history are implicated in the development of these symptoms.
• Further research into these mechanisms could inform early identification and intervention strategies for adolescent mental health.