I will pay for the following article Definition and Cause: Autism. The work is to be 6 pages with three to five sources, with in-text citations and a reference page. Several external sources of influence have been proposed to be causes of autism with the most recent example being the unsubstantiated claims of vaccine overload that were a hot news topic in recent years. It would be most appropriate to acknowledge autism as a complex disorder with several potential aggravating factors.
Autism is defined as one of several pervasive developmental disorders that also include Asperger syndrome, Rett syndrome, childhood disintegrative disorder, and a not-otherwise-specified category. These disorders are closely related in many aspects including symptomology and are sometimes represented as contributing to a spectrum of autism disorders. A 2007 study by Myers and Johnson reported a prevalence of 1 to 2 in 1,000 children for autism and almost 6 per 1,000 children for autism spectrum disorders. A lack of adequate data may mean that these numbers underestimate the true prevalence of autism.
Other significant statistics related to autism show that boys are at a higher risk than girls, and older fathers are more likely to have a child with autism. Some conditions that are comorbid with autism include genetic abnormalities, mental retardation, epilepsy, metabolic deficits, and anxiety disorders. Additionally, a variety of minor physical abnormalities are associated with the development of autism.
The observable symptoms of autism begin gradually in the second half of the first year of life and become solidified by the second or third year. The subsequent development of the disorder may continue into adulthood, though in a much less prominent way. There are three broad categories of symptoms related to autism including social impairment, communication problems, and repetitive behavior/restricted interests (Filipek et al., 1999).