1. Autism
... interests become evident in the first few years of life. Although the symptoms vary in nature and severity, language and the capacity for a normal social life are always seriously affected. Some people with autism are relatively high functioning, with speech and intelligence intact. Others are mentally retarded, ... in the environment can also lead to autism. Scientists have also identified chemicals in the brain that may be involved in autistic disorder. As a normal brain develops, the level of serotonin, a chemical found in the brain, declines. In most children with autistic disorder h...
- Word Count: 3163
- Approx Pages: 13
- Has Bibliography