Special Populations and Conditions

Autism, or autism spectrum disorder (ASD), encompasses a range of pervasive developmental disorders. These disorders vary in degree from mild forms like Asperger's syndrome to severe impairment. Autism is characterized by difficulties with communication and social interaction and by repetitive behavior patterns. The disorder has become very common, occurring in more than 1 percent of children. Autism is four times more likely to occur in males. Besides Asperger's syndrome, there are several other types of ASD, including pervasive developmental disorder not otherwise specified, childhood disintegrative disorder, and Rett's syndrome.

Dementia is not a single disorder, but rather a combination of age-related symptoms involving a loss of mental skills and deteriorating brain function. Dementia literally translates to "deprived of mind," and may be the result of several different underlying conditions, some of which are treatable and some of which are not. Patients with dementia gradually lose memory, communication skills, the ability to reason, and the facility to complete the tasks of everyday living.