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Asperger syndrome (AS), also known as Asperger's syndrome or Asperger's, is a diagnostic label that has been used to describe a neurodevelopmental disorder characterized by significant difficulties in social interaction and nonverbal communication, along with restricted, repetitive patterns of behavior and interests. [5]
Disorders formerly considered distinct, but now diagnosed as autism spectrum disorder, include: Asperger syndrome – a previously diagnosed form of autism often applied to people with a higher IQ who can have a less difficult time communicating with others and understanding concepts or phrases than other individuals with more severe autism. As ...
[283] [284] [285] Asperger syndrome was traditionally called "schizoid disorder of childhood". Genetic disorders – about 10–15% of autism cases have an identifiable Mendelian (single-gene) condition, chromosome abnormality, or other genetic syndromes. [286] Several metabolic defects, such as phenylketonuria, are associated with autistic ...
The DSM-V made a new, broad diagnosis in 2013 of autism spectrum disorder (ASD). This category contains the previous individual diagnoses of Autistic Disorder, Asperger's Syndrome, and other related developmental disorders. ASD is rated on levels of severity on a scale ranging from severe, through moderate, to mild based on clinical ...
ASD (autism spectrum disorder) is a neurodevelopmental disorder marked by impairments in communicative ability and social interaction, as well as restricted and repetitive behaviors, interests, or activities not suitable for the individual's developmental stage. The severity of symptoms and functional impairment vary between individuals. [3]
Fragile X syndrome is the most common inherited form of intellectual disability. It was so named because one part of the X chromosome has a defective piece that appears pinched and fragile when under a microscope. Fragile X syndrome affects about two to five percent of people with ASD. [40]
Classic autism, also known as childhood autism, autistic disorder, or Kanner's syndrome, is a formerly diagnosed neurodevelopmental disorder first described by Leo Kanner in 1943. It is characterized by atypical and impaired development in social interaction and communication as well as restricted, repetitive behaviors, activities, and interests.
Sleeping and language impairments, seizures, and developmental timing are common in both autism and Rett syndrome (RTT). Because of these phenotypic similarities, there has been research into the specific genetic similarities between these two pervasive developmental disorders. MECP2 has been identified as the predominant gene involved in RTT.