Autism, now called autism spectrum disorder (ASD), is a neurodevelopmental disorder. ASD is a developmental disability caused by differences in your childs brain. People with ASD may behave, interact and learn in ways that are different from other people. They may have trouble with social interactions and with interpreting and using nonverbal and verbal communication.
Autism definition
Autism means your child may have:
- Difficulties interacting with other people or differences in how they interact with others.
- Trouble using and understanding nonverbal communication, like eye contact, gestures and facial expressions.
- Delayed or absent language development.
- Trouble forming and understanding relationships.
- Repetitive motor behaviors, like flapping arms, body rocking or repetitive speech or play.
- Insistence on sameness in environment or routine.
- Intense or unusual interests.
- Sensory aversions, like dislike of loud noises, or sensory-seeking behaviors.
How well your child can function in day-to-day life depends on the severity of their symptoms. Given that ASD varies widely in severity and everyday impairment, the symptoms of some people are not always easily recognized.
Autism vs. autism spectrum disorder (ASD) — what is the difference?
The American Psychiatric Association changed the term autism to autism spectrum disorder in 2013. ASD is now an umbrella term that covers the different levels of autism. The autism spectrum includes conditions that providers used to consider separate, including:
Autism.
Asperger syndrome.
Pervasive developmental disorder — not otherwise specified (PDD-NOS).
Asperger vs. autism — what is the difference?
Healthcare providers do not officially recognize Asperger syndrome as its own condition anymore. They used to consider Asperger and autism as different conditions. The symptoms that were once part of an Aspergers diagnosis now fall under the autism spectrum. Providers consider Aspergers a mild form of autism. Some people still use the term Aspergers syndrome to describe their condition.
What is high-functioning autism?
High-functioning autism is not an official medical diagnosis. However, some people use the term to describe a mild form of autism that requires lower levels of support. People on the mild end of the autism spectrum can speak, read, write and handle basic life skills. Providers used to call this Asperger syndrome.
Autism vs. ADHD — is ADHD on the autism spectrum?
Autism spectrum disorder and attention-deficit/hyperactivity disorder (ADHD) have many similarities, but ADHD is not on the autism spectrum. The symptoms of ADHD and autism can overlap. Both conditions cause children to have trouble paying attention, and both can affect their social skills. These overlapping symptoms can sometimes lead to incorrect diagnoses.
ADHD and autism are related genetically, as well. Having one of these conditions increases your childs risk of having the other. And a child with autism has a higher chance of having a close relative with ADHD.
How common is autism?
According to the Centers for Disease Control and Prevention, ASD affects about 1 in every 44 8-year-old children.
Autism in boys and children assigned male at birth (AMAB) is much more likely than autism in girls and children assigned female at birth (AFAB). It is more than four times more common in boys and children AMAB than in girls and children AFAB.
When might you begin to wonder if your child has autism spectrum disorder (ASD)?
Researchers believe ASD is a disorder of very early brain development. The behavioral signs of autism characteristics typically surface between the ages of 1.5 and 3 years old.
SYMPTOMS AND CAUSES
What are the symptoms of autism?
Autism symptoms range from mild to severely disabling, and every person is different. You should consider the following signs of autism as possible indicators that your child may be at risk for the condition. If your child shows any of the following early signs of autism, get in touch with their healthcare provider. They may recommend a referral for an autism evaluation.
Signs of autism include difficulties with social interactions, such as:
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- Your child does not look at you when you call their name or responds inconsistently.
- Your baby does not smile widely or make warm, joyful expressions by the age of 6 months.
- Your baby does not engage in smiling, making sounds and making faces with you or other people by the age of 9 months.
- Your baby does not babble by the age of 12 months.
- Your baby does not use gestures such as reaching or waving by the age of 12 months.
- Your baby does not play any back-and-forth games, like “peek-a-boo,” by the age of 12 months.
- Your toddler does not say any words by the age of 16 months.
- Your toddler does not speak any meaningful, two-word phrases (not including imitating or repeating) by the age of 24 months.
- Any loss of speech, babbling or social skills.
Signs of autism also include specific behaviors, called restricted or repetitive behaviors or interests:
- Your child often lines up toys or plays with toys the same way every time.
- Your child must follow certain routines or has extreme reactions to small changes in routine.
- Your child has obsessive or very unusual interests.
- Your child has significant sensory aversions, like dislike of loud noises, dislike of how certain clothes fit or feel or very picky eating.
- Your child has sensory-seeking behaviors, like looking out of the corner of their eye at objects (peering), sniffing or licking objects.
What causes autism?
There is no clear-cut cause of ASD. Research supports genetic and environmental factors as some causes of autism. Scientists believe there could be many different causes of ASD that act together to change the ways people develop. They still have a lot to learn about the causes and how they impact people with ASD.
Is autism genetic?
Genetics do play a role in autism. But healthcare providers have only identified specific genetic causes in 10% to 20% of cases. These cases include specific genetic syndromes associated with ASD, such as fragile X syndrome, and rare changes in genetic code.
Are siblings at greater risk for autism spectrum disorder (ASD)?
Autism is hereditary. When one child receives an ASD diagnosis, the next child has about a 20% greater risk of developing autism than normal. When the first two children in a family have ASD, the third child has about a 32% greater risk of developing ASD.
Do vaccines cause autism (ASD)?
Many scientifically sound studies have proven that vaccines do not cause autism. When children suddenly show symptoms of ASD, some parents mistakenly blame a recent vaccination. No reliable study has found any proven link between childhood vaccination and autism.
What are the risk factors for autism?
This field of study is an active one for research. Current known risk factors for autism include:
- Birthing parent of age 35 or older.
- Use of valproic acid or thalidomide by the birthing parent during pregnancy.
- Premature labor and birth.
- Complications during birth.
- Low birth weight.
- Having a sibling with autism.
- Having certain chromosomal or genetic conditions.
