autism

autism , developmental disability resulting from a neurological disorder that affects the normal functioning of the brain. It is characterized by the abnormal development of communication skills, social skills, and reasoning. Males are affected four times as often as females. Children may appear generally normal until around the age of 24 to 30 months, although studies have identified signs of autism in children under a year of age.

Symptoms, which vary widely in severity, include impairment in social interaction, fixation on inanimate objects, inability to communicate normally, and resistance to changes in daily routine. Characteristic traits include lack of eye contact, repetition of words or phrases, unmotivated tantrums, inability to express needs verbally, and insensitivity to pain. Behaviors may change over time. Autistic children often have other disorders of brain function; about two thirds are mentally retarded; over one quarter develop seizures.

The cause of autism remains unclear, but a psychological one has been ruled out. Neurological studies indicate a primary brain dysfunction, perhaps related to abnormalities that appear to occur in the way the autistic child's brain develops. A genetic component is suggested by a pattern of autism in some families, and the condition also appears to be more common in children born to older fathers. Treatment in which autistic children are intensively and repetitively taught skills and behaviors from a young age appears to help some children with the disorder.

Bibliography: See M. M. Scariano and T. Grandin, Emergence: Labeled Autistic (1986); L. Wing, ed., Aspects of Autism (1988); T. Grandin, Thinking in Pictures (1995). See also publications of the Autism Society of America.

autism (aw-tizm) n.
1. (autistic disorder, Kanner's syndrome, infantile autism) a psychiatric disorder of childhood, with an onset before the age of 2½ years, marked by severe difficulties in communicating and forming relationships with other people, in developing language, and in using abstract concepts; repetitive and limited patterns of behaviour; and obsessive resistance to tiny changes in familiar surroundings. About 50% of autistic children have learning disabilities. Autism and similar developmental disorders (including Asperger's syndrome and Rett's syndrome) are known as autistic spectrum disorders.

2. the condition of retreating from realistic thinking to self-centred fantasy thinking: a symptom of personality disorder and schizophrenia.
—autistic adj. www.nas.org.uk Website of the National Autistic Society

autism Disorder, usually first appearing in early childhood, characterized by a withdrawal from social behaviour, communication difficulties and ritualistic behaviour. Autistic people have difficulty understanding themselves or others as agents with varying beliefs and desires. The causes of autism may originate in genetics, brain damage or psychology.