TY - CHAP M1 - Book, Section TI - Neuropsychiatry of Autism Spectrum Disorder A1 - Hauptman, Aaron J. A1 - Robbins, James O. A1 - McDougle, Christopher J. A2 - Silbersweig, David A. A2 - Safar, Laura T. A2 - Daffner, Kirk R. PY - 2021 T2 - Neuropsychiatry and Behavioral Neurology: Principles and Practice AB - Autism spectrum disorder (ASD) is a heterogeneous developmental neuropsychiatric condition characterized by two core symptom criteria: (1) deficits in social communication and social interaction; and (2) restricted patterns of repetitive behaviors and interests or activities.1 Previously, ASD was not a formal diagnostic term. Autistic disorder was included under the broader category of pervasive developmental disorders (PDDs) with other neurodevelopmental conditions characterized by impaired social behavior and communication along with restricted interests and repetitive behavior. Those additional conditions included Asperger’s disorder, Rett’s disorder, child disintegrative disorder and PDD, not otherwise specified (NOS). In DSM-5, autistic disorder, Asperger’s disorder, and PDD NOS have been subsumed under the category of ASD while Rett’s disorder and childhood disintegrative disorder have been removed and are not considered to fall within the rubric of ASD. In DSM-5, if ASD symptoms are clinically present in the setting of a genetic condition such as Rett’s disorder, the individual is diagnosed with ASD with the specifier, “associated with a known medical or genetic condition or environmental factor.” SN - PB - McGraw Hill CY - New York, NY Y2 - 2024/04/25 UR - neurology.mhmedical.com/content.aspx?aid=1178762672 ER -