Autism is a developmental disorder characterised by aberrant language development, impaired reciprocal social interactions and restricted behaviour repertoire. Apart from the above there are many associated problems. Seventy five percentages are mentally retarded and up to twenty five percent have seizures.
Other symptoms associated are mood symptoms like irritability, crying and laughing without any reason, aggression and self-injuriousbehavior like biting ,scratching, head banging and hair pulling, hyperactivity and inattention .Physical illnesses like upper respiratory tract infection, gastro intestinal symptoms like constipation and loose bowel movements,insomnia,feeding problems and enuresis are also frequently found.
The etiology of autism is found to be due to genetic factors, perinatal insults and neuroanatomical factors. There is increased size in the occipital, temporal and parietal lobe as compared to children without autism. High plasma serotonin is also found to be one factor.
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