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Autism is categorized as part of a larger group of disabilities called Pervasive Developmental Disorders, or PDD's. Among other PDD's, such as Down syndrome and schizophrenia, autism rates as the fourth most common (Powers 10). General symptoms of PDD's include impaired social interaction and communication skills. Symptoms, however, range on a continuum from mild to severe. While mild behavior is in no way dangerous, severe behavior can be very aggressive and can even result in self-injury.
No single factor has been determined as a cause for autism, but researchers have come up with several theories. One probable cause is an abnormality in gene structure, which is acquired genetically. These genetic conditions affect brain development. Another possibility is that autism is the result of a diet lacking some vitamins, minerals, and amino acids. Both of these hypotheses can contribute to neurological abnormalities. The affected areas of the brain include the cerebellum, hippocampus, and amygdala. The neurons in this part of the brain develop to be smaller than normal, and the nerve fibers are stunted.
Two other theories, which have yet to be proven, deal with reactions to something in the diet of either the parent of the child during pregnancy or of the child at an early age. One idea is that an autoimmune disease causes the immune system to attack the brain. In addition, scientists have researched the possibility of the effects of digesting cow meat. Small bacteria, called rogue peptides are produced when people have difficulty digesting cow's meat. These rogue peptides imitate neurotransmitters and hormones. They then flow through the bloodstream to the brain, causing abnormalities in brain development. Still, though, these theories are being further investigated.
The symptoms of autism can be described as a "triad of impairments" ("What" 2). The three areas of development that are affected are social interaction, social communication, and imagination. Autistic children have difficulty developing relationships with people. During the toddler years, children tend to struggle learning to use both verbal, and non-verbal communication. Also, their "play" tactics are abnormal, and they lack in the development of imagination.
Autistic children don't interact normally, and sometimes not even at all, with others. At young ages, they show very little attachment to their parents and often resist being held. Some are so passive that during infancy they must be awakened to be fed. Usually quiet and oblivious to the world around them, autistic people live in a concealed life of confusion.
Another unusual characteristic of an autistic person is in s
Names mentioned in this term paper
Organizations referenced in this report
National Autistic Society., Autism Research Institute, PDD,
Locations included in this paper
New Jersey, New York,
Health Conditions referenced in this report
the disease, mental retardation, confusion, Down syndrome,
Companies mentioned in this report
Keywords referenced in this report
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