J Korean Acad Child Adolesc Psychiatry.  2009 Jun;20(2):61-67.

Event-Related Potentials During the Visual Go/NoGo Task in Drug-Naive Boys with Attention-Deficit/Hyperactivity Disorder

Affiliations
  • 1Department of Psychiatry, College of Medicine University of Ulsan, Asan Medical Center, Seoul, Korea. hiyoo@amc.seoul.kr

Abstract

OBJECTIVES: The purpose of this study was to examine the performance and electrophysiological characteristics of drug-naive children with attention-deficit/hyperactivity disorder (ADHD) during the Go/NoGo task.
METHODS
Twenty-three boys with ADHD and 18 age-matched normal boys were recruited at a child psychiatric outpatient clinic in Seoul. All subjects were assessed by the Kiddie Schedules for Affective Disorders and Schizophrenia -Present and Lifetime version. The investigator also assessed all subjects using the ADHD Rating Scale-IV (ADHDRS). Event-related potentials were recorded from 8 scalp electrodes during the visual Go/NoGo task.
RESULTS
Children with ADHD showed a larger mean of standard deviation of response time during the Go/NoGo task than normal children. The temporal N200 and P300 amplitudes were larger in children with ADHD relative to controls. The parietal N200 and P300 latencies were more prolonged in children with ADHD compared to normal controls.
CONCLUSION
These results suggest that psychotropic-naive children with ADHD may have more variable performance ability, more difficulty in discriminating visual stimuli, and slower information processing speed than their normal agematched counterparts.

Keyword

Attention-Deficit/Hyperactivity Disorder; Event-Related Potentials; Neuropsychological Tests
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