OBJECTIVE: To explore neuropsychological performance in untreated Brazilian adolescents suffering from attention-deficit hyperactivity disorder (ADHD). METHOD: We assessed 30 untreated adolescents with ADHD and 60 healthy control subjects, aged 12 to 16 years, using a neuropsychological battery including the Wisconsin Card-Sorting Test (WCST), the Stroop Test (ST), the Digit Span, and the Word Span. RESULTS: We found neuropsychological differences among the DSM-IV ADHD subtypes. Adolescents with the predominantly inattentive subtype (ADHD-I) performed more poorly than did control subjects on both the Digit Span and the ST. On both the Digit Span and the WCST, adolescents with the combined subtype (ADHD-C) presented significantly more impairments than did control subjects. Adolescents with the predominantly hyperactive-impulsive type (ADHD-HI) did not differ significantly from the control subjects in any measure assessed, but had a better performance than did those with ADHD-C on both the Digit Span and the WCST. In addition, adolescents with ADHD-HI performed better on the ST than did adolescents with ADHD-I. CONCLUSIONS: These findings suggest cognitive differences among ADHD subtypes, supporting the diagnostic distinction among them. Adolescents with ADHD-HI do not seem to have significant cognitive deficits.
OBJECTIVE: To explore neuropsychological performance in untreated Brazilian adolescents suffering from attention-deficit hyperactivity disorder (ADHD). METHOD: We assessed 30 untreated adolescents with ADHD and 60 healthy control subjects, aged 12 to 16 years, using a neuropsychological battery including the Wisconsin Card-Sorting Test (WCST), the Stroop Test (ST), the Digit Span, and the Word Span. RESULTS: We found neuropsychological differences among the DSM-IV ADHD subtypes. Adolescents with the predominantly inattentive subtype (ADHD-I) performed more poorly than did control subjects on both the Digit Span and the ST. On both the Digit Span and the WCST, adolescents with the combined subtype (ADHD-C) presented significantly more impairments than did control subjects. Adolescents with the predominantly hyperactive-impulsive type (ADHD-HI) did not differ significantly from the control subjects in any measure assessed, but had a better performance than did those with ADHD-C on both the Digit Span and the WCST. In addition, adolescents with ADHD-HI performed better on the ST than did adolescents with ADHD-I. CONCLUSIONS: These findings suggest cognitive differences among ADHD subtypes, supporting the diagnostic distinction among them. Adolescents with ADHD-HI do not seem to have significant cognitive deficits.
Authors: Valerie Van Cauwenberge; Edmund J S Sonuga-Barke; Karel Hoppenbrouwers; Karla Van Leeuwen; Jan R Wiersema Journal: J Neural Transm (Vienna) Date: 2016-10-15 Impact factor: 3.575
Authors: Michelle A Shanahan; Bruce F Pennington; Benjamin E Yerys; Ashley Scott; Richard Boada; Erik G Willcutt; Richard K Olson; John C DeFries Journal: J Abnorm Child Psychol Date: 2006-10
Authors: Pedro E M S Ferreira; André Palmini; Claiton H D Bau; Eugenio Horacio Grevet; João Rubião Hoefel; Luis Augusto Rohde; Maurício Anés; Eloisa Elena Ferreira; Paulo Belmonte-de-Abreu Journal: J Neural Transm (Vienna) Date: 2009-04-28 Impact factor: 3.575
Authors: Russell Schachar; Shirley Chen; Jennifer Crosbie; Lisa Goos; Abel Ickowicz; Alice Charach Journal: J Can Acad Child Adolesc Psychiatry Date: 2007-05