in the recent years, the coherence index is used in many electroencephalographic studies for investigation of brain connectivity in children with adhd disorder. it is suggested that the coherence is a useful index in discrimination of adhd subjects from normal subjects. however, a few studies are accomplished in subtypes of adhd to identify of differences in functional connectivity between adhd...

adenotonsillar hypertrophy and obstructive sleep disordered breathing can lead to attention deficit/hyperactivity disorder (adhd). the purpose of this study was to evaluate effect of adenotonsillectomy on improvement of adhd symptoms in a quasi-experimental (before and after) study. the efficacy of adenotonsillectomy on improvement of adhd symptoms of 35 children aged 5-12 years with adenotonsi...

Most new cases of attention deficit-hyperactivity disorder (ADHD) are of the predominantly inattentive subtype. Research on the use of psychostimulants in these patients has shown a high rate of nonresponders. Although psychostimulants showed a short-term decrease in symptoms in students diagnosed with predominantly inattentive ADHD, they did not significantly improve grade-point averages.

PURPOSE To further characterize Attention-Deficit/Hyperactivity Disorder (ADHD) in a clinic-referred sample of youth with epilepsy. METHODS Children and adolescents with epilepsy who were referred for comprehensive neuropsychological evaluation comprised the sample. Data were obtained via archival record review. Youth with epilepsy were grouped according to ADHD diagnosis (no ADHD, ADHD - Com...

We studied 40 young adults with attention-deficit/hyperactivity disorder (ADHD; 18 predominantly inattentive type, 22 combined type) and 38 demographically comparable controls in a go/no-go choice reaction time task with 2 levels of difficulty. The ADHD/combined group was less accurate and had more variable reactions than controls. The ADHD/inattentive sample was slower than controls and had sm...

The aim of this study was to examine working memory (WM) modalities (visual-spatial and auditory-verbal) and processes (maintenance and manipulation) in children with and without attention-deficit/hyperactivity disorder (ADHD). The sample consisted of 63 8-year-old children with ADHD and an age- and sex-matched non-ADHD comparison group (N=51). Auditory-verbal and visual-spatial WM were assesse...

In attention-deficit/hyperactivity disorder (ADHD), a reduced phasic alerting response (event-related potential component P3 to cue stimuli) has been reported for different subtypes and task types in a series of studies. In order to get a refined picture of this attentional deficit, which is based on the analysis of averaged event-related potentials, we studied the distribution of single-trial ...

BACKGROUND Thyroid abnormalities have been associated with attention deficit/hyperactivity disorder (ADHD) and with other childhood psychiatric disorders. The goal of this study was to determine the relationships between thyroid hormone concentrations, neurocognitive functioning, and psychiatric diagnosis in children. METHODS Free thyroxine index (FT4I) and thyroid stimulating hormone (TSH) w...

The prevalence of ADHD was studied among 200 UAE school-age children. Variables that distinguish ADHD and non-ADHD children were examined, including child characteristics, parents’ sociodemographics, socioeconomic status, family environment, and parental style of influence. Results indicated that 12.5 % of the children had ADHD symptomatology, and that the prevalence ratio varied across the thr...

The behavioral difficulties of children with attention-deficit/hyperactivity disorder (ADHD) inattentive type differ from those of children with ADHD combined or hyperactive/impulsive type. Existing evidence-based interventions primarily target the disruptive and impulsive behaviors exhibited by children with ADHD combined and hyperactive/impulsive type. A number of recent advances have been ma...