Pervasive Developmental Disorder
PDD or Pervasive Developmental Disorder is a behavioral disorder of speech, communication, social interaction and repetitive type compulsive behavior.
Autism is a form of PDD. There are five types of PDD'S:
- PDD NOS (Pervasive Developmental Disorder Not Otherwise Specified).
- Childhood autism.
- Asperger's syndrome.
- Childhood disintegrative disorder.
- Rett's disease
The most commonly encountered are PDD NOS, Childhood autism and Asperger's syndrome. All these ¡§different¡¨ conditions have common diagnostic and physiologic features but differ slightly in the specific diagnostic criteria.
The general requirements are that one must have symptoms that belong to the three main areas of impairments:
- Social interactions.
- Repetitive stereotype behaviors.
A child who has any type of speech delay, the question of autism or PDD NOS must arise. Recent recommendations by the American Academy of Neurology (AAN) specify some general early guidelines in that regard. These include: