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The severity of symptoms and functional impairment vary between individuals. [3] There are many known environmental, genetic, and biological causes of autism. Research indicates that genetic factors are predominant in the appearance of autism; however, the heritability of autism is complex, and many of the genetic interactions involved are ...
Antipsychotics, antidepressants, stimulants (associated symptoms) [8][9][10] High-functioning autism (HFA) was historically an autism classification to describe a person who exhibited no intellectual disability but had some difficulty in communication, emotion recognition, expression, and/or social interaction. [11][12][13] However, many in ...
A 2003 review of epidemiological studies of children found autism rates ranging from 0.03 to 4.84 per 1,000, with the ratio of autism to Asperger syndrome ranging from 1.5:1 to 16:1; [145] combining the geometric mean ratio of 5:1 with a conservative prevalence estimate for autism of 1.3 per 1,000 suggests indirectly that the prevalence of AS ...
Autism is a condition that many people have at least heard of and with good reason: It's estimated that 1 in every 44 8-year-old children in the U.S. has autism spectrum disorder, according to ...
Childhood disintegrative disorder, also known as Heller's syndrome and disintegrative psychosis, is a rare condition characterized by late onset of developmental delays in language, social function, and motor skills. Researchers have not been successful in finding a cause for the disorder. CDD has some similarity to autism, and is sometimes ...
According to the CDC's Morbidity and Mortality Weekly Report, which looked at data from 11 communities around the U.S., 1 in 36 (2.8%) children aged 8 were identified as having autism spectrum ...
Fragile X syndrome (FXS) is a genetic neurodevelopmental disorder characterized by mild-to-moderate intellectual disability. [1] The average IQ in males with FXS is under 55, while about two thirds of affected females are intellectually disabled. [3][4] Physical features may include a long and narrow face, large ears, flexible fingers, and ...
Diagnosis of autism. The diagnosis of autism is based on a person's reported and directly observed behavior. [1] There are no known biomarkers for autism spectrum conditions that allow for a conclusive diagnosis. [2] In most cases, diagnostic criteria codified in the World Health Organization's International Classification of Diseases (ICD) or ...