Home > Health Library > Autism Spectrum Disorders
Once known as pervasive developmental disorders (PDDs), autism spectrum disorders (ASDs) is an umbrella term used to
define a class of disorders.
Disorders that are included in this class are:
Until recently, people were diagnosed with one of the types of ASD. For example, a person was diagnosed with Asperger's syndrome. Now, the diagnosis of ASD is used, and the severity of the condition is noted.
Some children do not meet the diagnostic criteria for an autism spectrum disorder (ASD) but still may have developmental and behavioral problems that are similar to those found in ASDs. These problems include abnormal sensitivities and unusual behavioral responses to certain situations. In these cases, a diagnosis of unspecified neurodevelopmental disorder may be used.
Children with ASDs have
difficulty in areas of social and emotional development, including:
The severity of an ASD varies by individual. Severely affected children
are unable to function without significant help from parents and other
caregivers. Other children are mildly affected and can develop adequate skills
to lead independent lives as adults. Many children are affected at levels
somewhere between these two extremes.
Autism spectrum disorders are present at birth. But the
signs of these disorders may not be noticed until later, usually during the
first 3 years of a child's life.
ByHealthwise StaffPrimary Medical ReviewerJohn Pope, MD - PediatricsSpecialist Medical ReviewerFred Volkmar, MD - Child and Adolescent Psychiatry
Current as ofNovember 14, 2014
Current as of:
November 14, 2014
John Pope, MD - Pediatrics & Fred Volkmar, MD - Child and Adolescent Psychiatry
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