Autism in most diagnostic systems is classified among the developmental disorders. This is appropriate in almost all cases, even though the occasional appearance of fullblown autistic syndromes in adolescents (Gillberg, 1986) (and even adults; Gillberg, 1991) highlights the need to keep an open mind about the biological basis for autistic symptoms being a priori linked with developmental proces...

Autism and autism spectrum disorders (ASDs) such as Rett syndrome and Asperger syndromeare enigmatic and complex neurodevelopmental disorders, thought to have originated inparticular interactions of genetic and environmental factors. Despite the extensive research,exact mechanism of pathogenesis is not still completely understood. ASDs are characterizedby deficits and abnormalities in communica...

The present study examined the prevalence of comorbid anxiety symptoms in 44 children with pervasive developmental disorders. Parents of the children were interviewed using the Anxiety Disorders section of the Diagnostic Interview Schedule for Children. Results indicated that severe anxiety symptoms are highly prevalent in children with pervasive developmental disorders: 84.1% of the children m...

Autistic disorder and the group of related conditions defined as pervasive developmental disorders are chronic neurodevelopmental disorders starting in early childhood and affecting a significant number of children and families. Although the causes and much of the pathophysiology of the disorder remain unknown, in recent years a number of available medication treatments have been identified as ...