Pervasive Developmental Disorders

The diagnostic category of pervasive developmental disorders (PDD) refers to a group of disorders characterized by delays in the development of socialization and communication skills. Parents may note symptoms as early as infancy, although the typical age of onset is before 3 years of age. Symptoms may include problems with using and understanding language; difficulty relating to people, objects, and events; unusual play with toys and other objects; difficulty with changes in routine or familiar surroundings, and repetitive body movements or behavior patterns. Autism (a developmental brain disorder characterized by impaired social interaction and communication skills, and a limited range of activities and interests) is the most characteristic and best studied PDD. Other types of PDD include Asperger's Syndrome, Childhood Disintegrative Disorder, and Rett's Syndrome. Children with PDD vary widely in abilities, intelligence, and behaviors. Some children do not speak at all, others speak in limited phrases or conversations, and some have relatively normal language development. Repetitive play skills and limited social skills are generally evident. Unusual responses to sensory information, such as loud noises and lights, are also common.

Treatment

There is no known cure for PDD. Medications are used to address specific behavioral problems; therapy for children with PDD should be specialized according to need. Some children with PDD benefit from specialized classrooms in which the class size is small and instruction is given on a one-to-one basis. Others function well in standard special education classes or regular classes with additional support.

Prognosis

Early intervention including appropriate and specialized educational programs and support services plays a critical role in improving the outcome of individuals with PDD. PDD is not fatal and does not affect normal life expectancy.

Research

The NINDS conducts and supports research on developmental disabilities, including PDD. Much of this research focuses on understanding the neurological basis of PDD and on developing techniques to diagnose, treat, prevent, and ultimately cure this and similar disorders.

Organizations

National Dissemination Center for Children with Disabilities

U.S. Dept. of Education, Office of Special Education Programs
1825 Connecticut Avenue NW, Suite 700
Washington, DC 20009
nichcy@aed.org
http://www.nichcy.org
Tel: Washington
Fax: 202-884-8441

National Institute of Mental Health (NIMH)

National Institutes of Health, DHHS
6001 Executive Blvd. Rm. 8184, MSC 9663
Bethesda, MD 20892-9663
nimhinfo@nih.gov
http://www.nimh.nih.gov
Tel: Bethesda
Fax: 301-443-4279

National Institute on Deafness and Other Communication Disorders Information Clearinghouse

1 Communication Avenue
Bethesda, MD 20892-3456
nidcdinfo@nidcd.nih.gov
http://www.nidcd.nih.gov
Tel: Bethesda

National Institute of Child Health and Human Information Resource Center

P.O. Box 3006
Rockville, MD 20847
NICHDInformationResourceCenter@mail.nih.gov
http://www.nichd.nih.gov
Tel: Rockville
Fax: 301-984-1473

Content Provided By

NINDS Disorders is an index of neurological conditions provided by the National Institute of Neurological Disorders and Stroke. This valuable tool offers detailed descriptions, facts on treatment and prognosis, and patient organization contact information for over 500 identified neurological disorders.

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