Causes and Signs of Autism

Autism is a brain disorder than affects one in every one hundred fifty to one hundred seventy five children. It is characterized by delayed or impaired communication and social interaction and is usually diagnosed by the time a child is three years old, when their parents notice that these things aren't developing normally. For such a common disease, it is interesting to note that little is known about it and much is speculation. This is a guide to things that are thought to be common indicators of autism and that which are known to be symptoms of the disease.

Causes

There are two prevailing theories about prospective causes of autism: vaccines and genetics. Because of the high mercury content in some childhood vaccines, many parents believe that they are the cause of their children's autism. In fact, as a preventative measure, some parents choose not to vaccinate their children altogether. However, numerous studies have shown that vaccines do not cause autism and that it is instead something that people are born with, a part of their genetics. Given that autism tends to run in families, this is a more plausible theory and scientists are still trying to find an "autism gene". However, because they have not, there is still no way to look for the disease in an amniocentesis or test for it before a child's birth.

Symptoms

Because there is still no way to detect or prevent autism before the actual diagnosis, the only thing that parents can do is look for the signs in their child. First, it is vital to know that because autism is such a varied disease and affects different parts of the brain, there is no such thing as a "typical" autistic person. The disease affects each person differently. However, there are still some common things to look for.

Most children with the disease are diagnosed at age three. Because it causes a delay in communication and social interaction, these delays start to become evident at the age where such things should be improving rather than remaining stagnant or regressing. These delays include a reluctance or refusal to learn to speak, a lack of eye contact, and the need to repeat certain behaviors over and over. In addition, if your child becomes disruptive, angry, or upset whenever his or her normal routine is changed in even the slightest way, that is another possible sign of autism. Obviously, these behaviors can occur in children who do not have autism as well, but if you notice your child exhibiting over a prolonged period of time, with no improvement, it's a good idea to consult your doctor.

Source: Web MD http://www.webmd.com/brain/autism/autism-topic-overview