What Types of Neurodevelopmental Disorders Are There?

There are several types of neurodevelopmental disorders (NDDs):

Developmental Delay

Developmental delay means that a child’s development lags behind what is expected. It is not a temporary delay, but a delay that continues as the child gets older. Delays can occur in one or more areas of development, including motor (movement of the body), thinking, speech, or social skills.

Intellectual Disability
Intellectual disability means that a person has:

  • Intelligence quotient (IQ) approximately 70 or below
  • Symptoms start before 18 years of age 
  • Problems with social skills, learning, and/or doing the things they need to take care of themselves each day

Autism Spectrum Disorders
Autism spectrum disorders cause differences with behavior, social skills and communication. They start when children are young. Some other names for autism spectrum disorders are:

  • Autism
  • Asperger syndrome
  • Pervasive developmental delay-not otherwise specified (PDD-NOS)

Learning that your child (or a family member) has a neurodevelopmental disorder (NDD) can help your healthcare provider talk with you about what to expect and what treatments might be most appropriate. It may also help you understand if other family members could also have a NDD.