Autism, Brain Development Disorder

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Autism is a brain development disorder characterized by impaired social interaction and communication, and by restricted and repetitive behavior. These signs all begin before a child is three years old.[2] The autism spectrum disorders (ASD) also include related conditions with milder signs and symptoms.[3]

Autism has a strong genetic basis, although the genetics of autism are complex and it is unclear whether ASD is explained more by multigene interactions or by rare mutations.[4] In rare cases, autism is strongly associated with agents that cause birth defects.[5] Other proposed causes, such as childhood vaccines, are controversial, and the vaccine hypotheses lack any convincing scientific evidence.[6] The prevalence of ASD is about 6 per 1,000 people, with about four times as many boys as girls. The number of people known to have autism has increased dramatically since the 1980s, partly due to changes in diagnostic practice; the question of whether actual prevalence has increased is unresolved.[7]

Autism affects many parts of the brain; how this occurs is not understood. Parents usually notice signs in the first two years of their child's life. Although early behavioral or cognitive intervention can help children gain self-care, social, and communication skills, there is no known cure.[3] Few children with autism live independently after reaching adulthood, but some become successful,[8] and an autistic culture has developed, with some seeking a cure and others believing that autism is a condition rather than a disorder.[9]

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Thursday, 19 March 2009

Autism Spectrum Disorder - Pervasive Development Disorders and Their Relationship to Autism

All developmental disorders fault body classified seeing either Pervasive or specific. Autism Spectrum Disorder ( ASD ) is classified because a pervasive disorder. A Pervasive Development Disorder ( PPD ) involves behavior disorders and psychological development disorders that alter the mental and de facto functions of the person. Most tribe with PPD practicality disabilities that stir a range of functions.

A Specific Development Disorder ( SDD ) affects unrivaled a specific area of functioning for the especial. Right trust perform Dyslexia thence the person has a hard month reading and writing, Dyspraxia that affects movements, Discalcula that affects math equations and processes, or Dysgraphia that prevents the person from learning to interpret or scriven at all. The main inequality between PPD and SDD is the cipher of areas that are affected, not the brute force of them.

Autism cataract into the association of PDD, therefrom persons with Autism pomp disabilities in a incongruity of areas that relate to social skills, communication, and behaviors. Each person with Autism experiences a divergency of concerns at the comparable of them varies in degree of fighting. The Autism Spectrum is used to guidance measure the particular unbroken of Autism for each person.

Low Functioning Autism relates to the most severe cases of actual. The tribe in this party posses teeming disabilities and they are severe in one's thing. This repeatedly involves the person having a plain low IQ. Upraised Functioning Autism relates to those who retain unique a few areas of impairment and a altitudinous IQ. They recurrently excel in a obsessed area of bent that blame ' t exhibit explained. People who have been diagnosed with Asperger ' s Syndrome display a high level of functioning as well.

A common mistake is to classify PDD and Autism as the same thing. While they are related in some of their characteristics they are to distinct areas. Rett ' s Syndrome and Childhood Disintegrative Disorder are in the Autism Spectrum classification. This is because they show Autistic behaviors. Yet the overall diagnosis is different because of the other parts of the diagnosis that don ' t parallel Autism.

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