Autism in children

Childhood autism is a subtype of generalized developmental disorder. It is a developmental disorder characterized by barriers to contact with the outside world (including parents) that occurs in early childhood. Mainly manifested in different degrees of interpersonal communication obstacles, narrow interests and stereotyped behavior. About three-fourths of the children are accompanied by significant mental retardation, and some children have better ability in some aspects under the background of general mental retardation. More common in boys. In the past, it was called infantile autism, child autism, and it was related to psychological activities in children's perception, language and thinking, emotions, movements, and social areas. They belong to developmental disorders. It is currently classified in the category of psychological developmental disorders in taxonomy, and is called pervasive developmental disorder. The cause of this disease is unknown. Twin studies have shown that the rate of same disease is higher in monozygotic twins than in twins. EEG and brain imaging examinations have higher abnormal rates, but are not specific. Nervous system software signs are also more. Certain diseases, such as patients with fragile X syndrome, also have more autism symptoms.