Autism spectrum disorder - Symptoms and causes - Mayo Clinic
Overview Autism spectrum disorder is a condition related to brain development that affects how people see others and socialize with them. This causes problems in communication and getting along with others socially. The condition also includes limited and repeated patterns of behavior. The term "spectrum" in autism spectrum disorder refers to the wide range of symptoms and the severity of ...

Autism - Wikipedia
Autism is primarily characterized by differences and difficulties in social interaction and communication, alongside restricted or repetitive patterns of interests, activities, or behaviors (stimming), and, in many cases, distinctive reactions to sensory input. The specific presentation varies widely. [37][38] Clinicians often consider assessment for autism when these characteristics are ...

What is Autism? - Autism Research Institute
Autism is a developmental disorder that appears within the first three years of life. Learn about presentations, diagnosis, and care.

Signs and Symptoms of Autism Spectrum Disorder
Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. People with ASD often have problems with social communication and interaction, and restricted or repetitive behaviors or interests. People with ASD may also have different ways of learning, moving, or paying attention. It is important to note that some people without ASD might also have some of ...

Autism spectrum disorder (ASD) | Autism Speaks
What is autism? Learn about autism spectrum disorder (ASD), the autism definition, a brief overview of co-occurring conditions and access helpful resources.

Autism: Symptoms, Causes, Types, and Testing - WebMD
Know about autism, including its symptoms, causes, types, and testing methods. Explore WebMD's comprehensive guide to better understand and manage autism.

About Autism Spectrum Disorder | Autism Spectrum Disorder (ASD) | CDC
Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain. Some people with ASD have a known difference, such as a genetic condition. Other causes are not yet known. Scientists believe there are multiple causes of ASD that act together to change the most common ways people develop. We still have much to learn about these causes and how they impact people ...

Autism Spectrum Disorder - National Institute of Mental Health (NIMH)
Describes autism spectrum disorder (ASD): signs and symptoms; causes and risk factors; diagnosis in children, teens, and adults; and treatments.

Autism Spectrum Disorder - National Institute of Mental Health (NIMH)
Learn about NIMH research on autism spectrum disorder. Find resources on the signs and symptoms of autism and potential treatments and therapies.

What is autism spectrum disorder? - Harvard Health
Autism spectrum disorder (ASD) is a complex neurological condition that affects how a person interacts, communicates, and experiences the world. Learn about its symptoms, causes, diagnosis, and sup...