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Autism is associated with several genetic disorders, [4] perhaps due to an overlap in genetic causes. [5] About 10–15% of autism cases have an identifiable Mendelian (single-gene) condition, chromosome abnormality, or other genetic syndrome, [6] a category referred to as syndromic autism.
The term "high-functioning autism" was used in a manner similar to Asperger syndrome, another outdated classification.The defining characteristic recognized by psychologists was a significant delay in the development of early speech and language skills, before the age of three years. [12]
Autism spectrum disorder [a] (ASD), or simply autism, is a neurodevelopmental disorder "characterized by persistent deficits in social communication and social interaction across multiple contexts" and "restricted, repetitive patterns of behavior, interests, or activities". [11] Sensory abnormalities are also included in the diagnostic manuals ...
These variabilities have led to the exploration of the clinical and molecular convergence between Rett syndrome and autism. [60] 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 ...
A high-functioning group (around 25 percent) whose symptoms more or less overlap with that of what was Asperger syndrome, while also not meeting the then current criteria for autism spectrum disorder, but who completely differ from those with Asperger syndrome in terms of having a lag in language development and/or mild cognitive impairment ...
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.
Autism cases spiked 175% among U.S. residents from 2011 to 2022. The rates climbed at a faster rate among young adults.
More specifically, prevalence estimates of catatonia among people with neurodevelopmental disorders (of which autism is one) have ranged from 6-20.2%, with the mean estimate falling at 9%; [1] similarly, in a recent meta-analysis of 12 studies of autistic catatonia, Vaquerizo-Serrano et al. suggest that catatonia is found in 10.4% of autistic ...