In the second and third years, autistic children have less frequent and less diverse babbl

Autism is a developmental disorder of the human brain that first shows signs during infancy or childhood and follows a steady course without remission or relapse. Impairments result from maturation-related changes in various systems of the brain. Autism is one of the five pervasive developmental dis

Autism is distinguished by a pattern of symptoms rather than one single symptom. The main characteristics are impairments in social interaction, impairments in communication, restricted interests and repetitive behavior. Other aspects, such as atypical eating, are also common but are not essential for diagnosis. Individual symptoms of autism occur in the general population and appear not to associate highly, without a sharp line separating pathological severity from common traits.