Increased performance uncertainty in children with ADHD? Elevated post-imperative negative variation (PINV) over the
Janina Werner1, Matthias Weisbrod, Franz Resch
1Department of Child and Adolescent Psychiatry, University of Heidelberg, Blumenstraße 8, D-69115 Heidelberg, Germany.
Behavioral and Brain Functions : BBF
|August 27, 2011
Summary
Children with attention deficit/hyperactivity disorder (ADHD) show heightened uncertainty in performance evaluation, indicated by increased postimperative negative variation (PINV). Methylphenidate (MPH) medication normalized these attention deficit/hyperactivity disorder (ADHD) related brain responses.
Area of Science:
- Neuroscience
- Developmental Psychology
- Clinical Psychiatry
Background:
- Attention deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder affecting executive functions.
- Response evaluation, specifically the postimperative negative variation (PINV), is a key indicator of performance uncertainty.
- Understanding these mechanisms in ADHD is crucial for developing targeted interventions.
Purpose of the Study:
- To investigate the influence of ADHD on response evaluation using the PINV.
- To examine the effect of methylphenidate (MPH) on PINV in children with ADHD.
- To explore the role of performance uncertainty in ADHD.
Main Methods:
- Utilized a 64-channel high-density EEG to record event-related potentials in 18 ADHD patients and 19 controls.
- Employed an audio-visual contingent negative variation (CNV) paradigm with a 3-second interstimulus interval.
- Administered methylphenidate (MPH) to the ADHD group in a second recording session.
Main Results:
- ADHD children exhibited significantly increased PINV negativity over the ventrolateral prefrontal cortex compared to controls.
- PINV amplitude was modulated by the side of motor response (left vs. right thumb).
- Methylphenidate (MPH) treatment normalized PINV amplitudes in ADHD children.
Conclusions:
- Children with ADHD experience greater uncertainty regarding performance correctness.
- Increased PINV in ADHD may reflect compensatory mechanisms for deficits in contingency evaluation.
- Further research is needed to clarify the contribution of eye-movement artifacts to PINV.
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