What is Autism Spectrum Disorder (ASD)?

Many people have heard of autism, but there is a lot of misunderstanding about what it actually is. Autism Spectrum Disorder (ASD) is a developmental disability that currently affects approximately 1% of the world population and about 1 in 68 children in the United States. ASD is an umbrella term that includes the previous diagnoses of autistic disorder, Asperger syndrome, PDD-NOS (pervasive developmental delay - not otherwise specified) and childhood disintegrative disorder. Boys are diagnosed with ASD at a much higher frequency than girls, although this may be due to misunderstanding of symptoms in girls therefore underdiagnosing them. ASD is a lifelong disorder. It is not something a child will “grow out of” and early intervention can greatly improve a child’s long term life experiences.

What classifies a person as having ASD is trouble with social communication and a need for repetitive behaviors. People with ASD range from being significantly impacted by their disorder to highly functioning and can range from severely mentally challenged to brilliantly gifted. No two people with ASD will show exactly the same symptoms. Only a very small percentage of people with ASD are savants.

Some things that are common in people with ASD are:
- Lack of eye contact
- Trouble relating to other people in a "normal" way
- Trouble expressing themselves, particularly emotionally or in social settings
- Fixed and repetitive behaviors
- Intense interest in a single or limited number of (often quite unique) topics
- Trouble adapting to changes in routine
- Odd speech patterns or speech delay
- Taking everything literally, trouble understanding figurative language or pretend play
- Abnormal reactions to sensory input
- Stimming (repetitive behaviors that are either self-soothing or in response to intense emotions)

Children are often diagnosed when their parents and pediatricians see that they are not reaching the same milestones other children their age should be meeting, although some children are diagnosed when they start losing skills they had already acquired. Although moderate to severe cases are often diagnosed by the age of two, many children, especially those who are less impacted by the disorder, are not diagnosed until much later. Some people are not diagnosed until they are adults.

There are many other conditions that are comorbid with ASD. Many people also have seizure disorders, sleep problems, stomach conditions, mental health issues, and sensory processing disorder to list a few. Due to autistic symptoms (like being non-verbal or processing sensory input differently) it is often hard to diagnose comorbid conditions in individuals with autism and in many cases they are written off as “part of the autism” when they are actual separate issues.

Although there is no completely established cause for ASD yet, there has been research and we are currently learning more about what might cause it. Although originally it was believed to be caused by lack of emotional connection by the mother, that is no longer believed to be a cause. It is believed that there is a genetic component to ASD. It has been shown that if a child has a sibling with ASD they are more likely to have it themselves and it does tend to run in families. It has also been shown that ASD is most likely triggered during gestation or shortly after birth. Children who are premature or low birth weight, born to older parents or to mothers who took certain drugs or had certain complications during pregnancy are more likely to develop ASD. Although there is a huge debate about a link between vaccines and autism, many large studies have been done and, as of now, the science stands firmly behind no link. The CDC is currently doing a large, ongoing study called SEED (Study to Explore Early Development) in hopes of finding out more information about the cause.

Many people are dismayed at an ASD diagnosis, but unless functioning is highly impaired and there is significant mental delay many, if not most, people diagnosed with ASD can live full lives, going to school, working, marrying and having children of their own. A diagnosis just explains why things are different with a person and allows the people around them to give them the support they need to thrive. There are many interventions and supports available to people on the spectrum today. People with ASD are just experiencing this world in a different way than the rest of the population.

Sources for details that were not already stored in my brain:
https://www.cdc.gov/ncbddd/autism/index.html
http://www.autism-society.org/what-is/facts-and-statistics/
https://www.nimh.nih.gov/health/topics/autism-spectrum-disorders-asd/index.shtml