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Autistic infants show less attention to social stimuli, smile and look at others less often, and respond less to their own name. Autistic toddlers differ more strikingly from social norms; for example, they have less eye contact and turn-taking, and do not have the ability to use simple movements to express themselves, such as pointing at ...
One in 100 people (1%) worldwide [ 9 ][ 10 ] Autism, also called autism spectrum disorder[ a ] (ASD), is a neurodevelopmental disorder characterized by symptoms of deficient reciprocal social communication and the presence of restricted, repetitive, and inflexible patterns of behavior. Autism generally affects a person's ability to understand ...
Early intervention in nonspeaking autism emphasizes the critical role of language acquisition before the age of five in predicting positive developmental outcomes; acquiring language before age five is a good indicator of positive child development, that early language development is crucial to educational achievement, employment, independence during adulthood, and social relationships. [2]
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 unknown. [ 1 ] In rare cases, autism has been associated with agents that cause birth ...
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 ...
The heritability of autism is the proportion of differences in expression of autism that can be explained by genetic variation; if the heritability of a condition is high, then the condition is considered to be primarily genetic. Autism has a strong genetic basis. Although the genetics of autism are complex, autism spectrum disorder (ASD) is ...
History of autism. The history of autism spans over a century; [1] autism has been subject to varying treatments, being pathologized or being viewed as a beneficial part of human neurodiversity. [2] The understanding of autism has been shaped by cultural, scientific, and societal factors, and its perception and treatment change over time as ...
Conditions comorbid to autism. Autism spectrum disorder (ASD) is a neurodevelopmental disorder that begins in early childhood, persists throughout adulthood, and affects two crucial areas of development: social communication and restricted, repetitive patterns of behavior. [1] There are many conditions comorbid to autism spectrum disorder, such ...
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