| Risk Factors
Autism is a spectrum of complex brain disorders. The disorders result in social, behavioral, and communication problems. Other conditions that are part of this spectrum include
and pervasive developmental disorder.
Autism is a neurodevelopmental disorder. This means that problems in brain development cause autism. Scientists are searching for answers about what causes these development problems. Studies suggest:
- Autism seems to run in some families. Several genes may be involved.
- Problems during pregnancy or delivery may interfere with normal brain development.
- Something in the environment that a child is exposed to may be a factor.
Factors that increase the risk of developing autism include:
- Sex: male
- Family history: siblings of a child with autism are at higher risk
- Having parents who are older
- Problems during pregnancy or delivery
A number of other conditions are related to autism, although the relationship between them is not clear:
The Conditions Above Primarily Affect the Central Nervous System
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Autism usually first appears during early childhood between 2-6 years old. The severity of symptoms varies. Behaviors and abilities may differ from day to day. Symptoms may decrease as the child grows older. Children with autism may have a combination of abnormal behaviors.
- Avoiding social contact
- Having problems with language such as loss of language
- Using words incorrectly
- Communicating with motions instead of words
- Avoiding eye contact
- Having trouble with nonverbal communication
- Lacking interest in normal activities for that age
- Spending a lot of time alone
- Not playing imaginatively
- Not starting pretend games
- Not imitating others
- Having sensitivity to sound, smell, taste, sights, and touch
- Reacting to stimulation in an abnormal way
- Not reacting to smiles
- Being hyperactive
- Being passive
- Having tantrums
- Being single-minded
- Being aggressive
- Hurting self
- Repetitive movement, such as rocking or flapping a hand
- Resisting change
- Forming unusual attachments to objects
- Sniffing or licking of toys
- Not understanding other peoples' feelings and needs
Being a picky eater
- Having gastrointestinal problems, such as diarrhea, constipation, or frequent abdominal pain
Some people with autism suffer from other disorders as well, including:
Doctors who specialize in autism will observe the child's behavior, social contacts, and communication abilities. They will evaluate mental and social development. Parents will be asked about the child's behavior. Some doctors ask parents to bring in videos of the child at home.
Tests may include:
- Neuropsychological tests
- Questionnaires and observation schedules
- Intelligence tests
Medical tests to rule out other conditions that cause similar symptoms may include:
- Blood tests
- Urine tests
- DNA testing
may also be done to record brain activity.
There is no cure for autism. The severity of symptoms may decrease over the years. Children with autism and their families may benefit from early intervention. Children aged 18-30 months who had high-intensity intervention showed improvements in their IQ, language, and behavior.
Children with autism respond well to a structured, expected schedule. Many children with autism learn to cope with their disabilities. Most need assistance and support throughout their lives. Others are able to work and live independently when they grow up.
Children with autism can benefit from:
Programs that meet the child's special needs improve the odds of learning. Children with autism may have trouble with assignments, concentration, and
anxiety. Teachers who understand the condition can work with the child's abilities. Programs should use the child's interests. Some children do better in a small-group setting. Others do well in regular classrooms with special support. Vocational training can help prepare young adults for a job.
Speech, physical, and occupational therapies may improve speech and activities. Children with autism need help developing social skills. Mental health professionals can help a family cope with caring for a child with autism. Counselors help parents learn how to manage behaviors.
ABA is a type of behavior program. It can be used in school, in a therapy setting, and at home. There are a number of different kinds of ABA programs. Talk to your child's doctor about which one might be helpful for your child.
There are no drugs to treat autism. Some drugs are used to help manage symptoms.
can also help treat obsessive and aggressive behaviors. Your child's doctor may use other medicines to help control other disruptive behaviors.
There are other treatments available. These include dietary changes and alternative therapies. Talk with your child's doctor first to see if any of these would be helpful for your child.
There are no guidelines to prevent autism. The cause is unknown. Scientists are searching for its underlying causes.
Autism 101: a free online course. The Autism Society website. Available at:
http://support.autism-society.org/site/PageServer?pagename=about_course. Accessed May 14, 2013.
Autism fact sheet. National Institute of Neurological Disorders and Stroke website. Available at:
http://www.ninds.nih.gov/disorders/autism/detail_autism.htm. Updated May 7, 2013. Accessed May 14, 2013.
Autism spectrum disorders. EBSCO DynaMed website. Available at:
https://dynamed.ebscohost.com/about/about-us. Updated May 6, 2013. Accessed May 14, 2013.
Autism spectrum disorders (ASDs). Centers for Disease Control and Prevention website. Available at:
http://www.cdc.gov/ncbddd/autism/index.html. Updated August 7, 2012. Accessed May 14, 2013.
Autism spectrum disorders (pervasive developmental disorders). National Institute of Mental Health website. Available at:
http://www.nimh.nih.gov/health/topics/autism-spectrum-disorders-pervasive-developmental-disorders/index.shtml. Updated May 14, 2013. Accessed May 14, 2013.
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Last reviewed May 2013 by Kari Kassir, MD;
Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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