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Neuropsychological functioning in stimulant-naive boys with hyperkinetic disorder

Rhodes, Sinéad M. and Coghill, David, R and Matthews, Keith (2005) Neuropsychological functioning in stimulant-naive boys with hyperkinetic disorder. Psychological Medicine, 35 (8). pp. 1109-1120. ISSN 0033-2917

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Although children with hyperkinetic disorder and/or attention deficit hyperactivity disorder (ADHD) show disordered executive neuropsychological functioning, the nature of these changes remains controversial. Additionally, impairments in non-executive neuropsychological functioning have been relatively unexplored. Here, the authors describe the neuropsychological functioning of a sample of stimulant drug-naive boys with hyperkinetic disorder on a battery of neuropsychological tasks sensitive to impairments of both executive and non-executive functions. Method. Seventy-five stimulant drug-naive boys meeting diagnostic criteria for ICD-10 hyperkinetic disorder were compared with 70 healthy developing controls matched for age but not IQ on computerized tests of neuropsychological functioning from the Cambridge Neuropsychological Test Automated Battery (CANTAB) and a Go/No-Go inhibition task. Boys with hyperkinetic disorder exhibited impairments on tasks with a prominent executive component - working memory, planning, strategy formation, attentional set-shifting and on a reaction time task. However, they were also impaired on tasks without prominent executive components - pattern and spatial recognition, spatial span, delayed matching to sample and paired associates learning. Contrary to predictions, no impairment was observed on the Go/No-Go inhibition task. Medication-naive boys with hyperkinetic disorder displayed a broad range of neuropsychological impairments. Deficits were demonstrated on tasks with and without prominent executive components. Impairments were not confined to tasks dependent upon frontostriatal functioning, cannot wholly be explained by deficits in inhibitory control, nor can they be attributed to intelligence or previous exposure to stimulant medication.

Item type: Article
ID code: 28666
Keywords: deficit-hyperactivity-disorder, attention-deficit/hyperactivity disorder, temporal-lobe excisions, spatial working-memory, frontal-lobe, amygdalo-hippocampectomy, response-inhibition, executive functions, children, ADHD, Psychology, Psychiatry and Mental health, Applied Psychology
Subjects: Philosophy. Psychology. Religion > Psychology
Department: Faculty of Humanities and Social Sciences (HaSS) > School of Psychological Science and Health > Psychology
Depositing user: Dr Sinead Rhodes
Date Deposited: 15 Nov 2010 12:27
Last modified: 15 Dec 2015 11:53

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