253 A central premise in the “catecholamine hypothesis” of attention-deficit/hyperactivity disorder (ADHD) is that dopamine (DA) dysfunction leads to clinical symptoms. The hypothesis arises, in part, from the clinical efficacy of methylphenidate, as well as evidence from brain imaging studies that suggest reduced activity in frontal-striatal regions. The theory, however, overlooks the phenotyp...

On average, 15% of young children, 2-8 years of age in the United States have a parent-reported mental, behavioral, or developmental disorder (MBDD) diagnosis, which includes attention-deficit/hyperactivity disorder (ADHD), depression, anxiety problems, behavioral or conduct problems such as oppositional defiant disorder or conduct disorder, Tourette syndrome, autism spectrum disorder, learning...

Background: Behavioral disorders in childhood are very important due to the possibility of behavioral-mental disorders in adulthood. The aim of this study was to determine the rate of behavioral disorders factors among children in the 4th and 5th grade of primary school in Rafsanjan City, Iran, in 2016. Materials and Methods: In this descriptive, cross-sectional study, 500 students were select...

Patients with Autism Spectrum Disorder present with a heterogeneous mix of features beyond the core symptoms of the disorder. These features can be emotional, cognitive or behavioral. Behavioral symptoms often include self-injury, and this may take the form of repetitive skin-picking. The prevalence of skin-picking disorder in Autism is unknown. Skin-picking may lead to significant medical and ...

introduction : attention deficit/hyperactivity disorder (adhd) is a disorder of neurobiological behavioral system. this disorder includes features such as attention deficit, impulsivity, and chronic, disproportionate-with-growth hyperactivity which reduce the child's ability to regulate, control, organize his behavior and cause attention deficit in activity of daily living (adl). adhd is one of...