Studies investigating the possible benefits of transcranial direct current stimulation on left dorsolateral prefrontal cortex in children and adolescents with attention-deficit hyperactivity disorder (ADHD) have not been performed. This study assesses the effect of transcranial direct current stimulation in children and adolescents with ADHD on neuropsychological tests of visual attention, visual and verbal working memory, and inhibitory control. An auto-matched clinical trial was performed involving transcranial direct current stimulation in children and adolescents with ADHD, using SNAP-IV and subtests Vocabulary and Cubes of the Wechsler Intelligence Scale for Children III (WISC-III). Subjects were assessed before and after transcranial direct current stimulation sessions with the Digit Span subtest of the WISC-III, inhibitory control subtest of the NEPSY-II, Corsi cubes, and the Visual Attention Test (TAVIS-3). There were 9 individuals with ADHD according to Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition) criteria. There was statistically significant difference in some aspects of TAVIS-3 tests and the inhibitory control subtest of NEPSY-II. Transcranial direct current stimulation can be related to a more efficient processing speed, improved detection of stimuli, and improved ability to switch between an ongoing activity and a new one.

No abstract

Manganese (Mn) is an essential element, however high levels of Mn have been associated with lower neuropsychological performance and behavioral problems in children. We investigated the associations between hair Mn concentrations and neuropsychological and behavioral performances among children with long-term exposure to airborne Mn aged between 7 and 12 years. Neuropsychological performance included tests of: verbal memory, inhibitory control, cognitive flexibility, verbal fluency, and motor function. We used the Conners Abbreviated Rating Scale for teachers to assess students' behaviors of hyperactivity. Hair manganese (MnH) concentrations in children and exposure to airborne manganese from a ferro-manganese alloy plant were analyzed and correlated with tests scores. Multivariable linear models adjusting for potential confounders showed that elevated levels of MnH were associated with lower performance in verbal memory, as measured by the free recall after interference (β = - 1.8; 95% CI: - 3.4, - 0.2), which indicates susceptibility to interference, and Delayed Effect (β = -2.0; 95% CI: -3.7, - 0.2), representing a loss of information over time. Additionally, we found patterns of effect modification by sex in three subtests measuring verbal memory: the free recall after interference score, Interference Effect, and Delayed Effect (all at p < 0.10). Overall, the results suggest that long-term airborne Mn exposure may be associated with lower performance in verbal memory, and hyperactivity behaviors.

No abstract

The study showed that abnormal RI within the first 72 hours was associated with healing complications in newborn infants with cerebral WML. Abnormal RI results were not correlated with the fatal outcome. Therefore, RI is an important parameter that should be measured in newborn infants.

Com o objetivo de correlacionar o QI Estimado com o QI Total, quatro bancos de dados do WISC III de 207 crianças foram associados: 1) crianças com desenvolvimento típico; 2) crianças com diagnóstico do transtorno do déficit de atenção e hiperatividade; 3) crianças referenciadas por dificuldades de aprendizagem em consultório particular; e 4) crianças com sequela neurológica avaliadas em ambulatório universitário. Os dados do QI total foram correlacionados aos do QI estimado, correspondentes à soma dos pontos ponderados dos subtestes Vocabulário e Cubos. Os resultados sugerem que o QI Estimado pode ser adotado quando há restrição de tempo e quando o desempenho intelectual está sendo usado como triagem em pesquisa, ou como ponto de referência dentro de uma avaliação neuropsicológica.

Transtorno do Déficit de Atenção com Hiperatividade, caracterizado por pobre atenção sustentada, diminuição do controle dos impulsos e excessiva atividade física, é encontrada em muitas culturas e em muitos países. O objetivo do presente artigo é revisar a literatura publicada sob o assunto, com ênfase nos aspectos neuropsicológicos. As conclusões encontradas são que a farmacoterapia em conjunção com terapia individual ou familiar são, geralmente, aceitos como os mais efetivos tratamentos, sendo os psicoestimulantes as drogas de escolha. A indicação de psicoterapia é discutida. A necessidade de cuidadoso diagnóstico e condução médica e psicológica é enfatizada.

psicologia.v17n1p120-135. Sistema de avaliação: às cegas por pares (double blind review).