A complex developmental disability, autism causes communication difficulties; social impairments; and restricted, repetitive, and stereotyped patterns of behavior. Persons with autism display a wide range of skills, symptoms, and levels of disability. Therefore, health care professionals consider autism as a “spectrum disorder”; i.e., a group of brain disorders showing similar features but with varying levels of severity.
In the current classification, autism spectrum disorder (ASD) includes three developmental disabilities. The first is referred to as autistic disorder (or “classic” autism), which is the most severe form of ASD. Asperger syndrome is a second and milder form of ASD. Finally, health care professionals use a broader term for atypical autism, called “pervasive developmental disorder not otherwise specified” (PDD-NOS). This last category includes childhood disintegrative disorder and Rett syndrome.
The Centers for Disease Control estimates that about 1 in 88 children have a form of ASD. Symptoms typically begin before age three and affect the normal development of various skills from infancy to adulthood.
About the Author:
David J. Flynn, DDS, has served on the Board of Directors of the Grace Foundation of New York, a nonprofit organization founded to improve the lives of individuals with autism spectrum disorder. He donates to charitable causes addressing the issue of autism. Since 1993, Dr. Flynn has maintained a private practice in dentistry on Staten Island.