[Visual perception of Kanji characters and complicated figures. Part 3. Visual P300 event-related potentials in patients with attention deficit/hyperactivity disorders].
In order to evaluate visual perception, the P300 event-related potentials (ERPs) for visual oddball tasks were recorded in 11 patients with attention deficit/hyperactivity disorders (AD/HD), 12 with mental retardation (MR) and 14 age-matched healthy controls. With the aim of revealing trial-to-trial variabilities which are neglected by investigating averaged ERPs, single sweep P300s (ss-P300s) were assessed in addition to averaged P300. There were no significant differences of averaged P300 latency and amplitude between controls and AD/HD patients. AD/HD patients showed an increased variability in the amplitude of ss-P300s, while MR patient showed an increased variability in latency. These findings suggest that in AD/HD patients general attention is impaired to a larger extent than selective attention and visual perception.
Department of Developmental Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Ichikawa. userswhite@yahoo.co.jp
Seiko
S
Shirane
Masumi
M
Inagaki
Yoshimi
Y
Sata
Makiko
M
Kaga
D001288:Attention / Q000502:physiology*; D001289:Attention Deficit Disorder with Hyperactivity / Q000503:physiopathology*; D002648:Child; D018913:Event-Related Potentials, P300; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000503:physiopathology; D008297:Male; D011930:Reaction Time / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*