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Abnormal ventromedial prefrontal cortex function in children with psychopathic traits during reversal learning.
Elizabeth C Finger1, Abigail A Marsh, Derek G Mitchell
1National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland, USA. elizabeth.finger@lhsc.on.ca
Archives of General Psychiatry
|May 7, 2008
Summary
Children with psychopathic traits exhibit impaired reversal learning due to abnormal ventromedial prefrontal cortex activity. This dysfunction is specific to psychopathic traits, not attention-deficit/hyperactivity disorder, impacting reinforcement processing.
Area of Science:
- Neuroscience
- Developmental Psychology
- Child Psychiatry
Background:
- Children with psychopathic traits and conduct/oppositional defiant disorder show impaired decision-making and reversal learning.
- The neural underpinnings of these impairments remain understudied.
- Distinguishing neural correlates of psychopathic traits from comorbid attention-deficit/hyperactivity disorder (ADHD) is crucial.
Purpose of the Study:
- To identify the specific brain regions responsible for reversal learning deficits in children with psychopathic traits and conduct or oppositional defiant disorder.
Main Methods:
- A case-control study involving 42 adolescents (aged 10-17).
- Participants included groups with psychopathic traits and conduct/oppositional defiant disorder, ADHD only, and healthy controls.
- Functional magnetic resonance imaging (fMRI) measured blood oxygenation level-dependent (BOLD) signals during a probabilistic reversal task.
Main Results:
- Children with psychopathic traits demonstrated altered ventromedial prefrontal cortex (vmPFC, Brodmann area 10) responses during punished reversal errors.
- These vmPFC abnormalities differed significantly compared to children with ADHD and healthy controls (P < .05, corrected).
Conclusions:
- This study provides initial evidence of abnormal vmPFC responsiveness in children with psychopathic traits.
- The observed dysfunction is not attributed to comorbid ADHD.
- Findings suggest reversal learning impairments in developmental psychopathy stem from aberrant processing of reinforcement information.
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