Autism spectrum disorder is a condition related to brain development that impacts how a person perceives and socializes with others, causing problems in social interaction and communication. The disorder also includes limited and repetitive patterns of behavior. The term "spectrum" in autism spectrum disorder refers to the wide range of symptoms and severity.
Autism spectrum disorder includes conditions that were previously considered separate — autism, Aspergers syndrome, childhood disintegrative disorder and an unspecified form of pervasive developmental disorder. Some people still use the term "Aspergers syndrome," which is generally thought to be at the mild end of autism spectrum disorder.
Autism spectrum disorder begins in early childhood and eventually causes problems functioning in society — socially, in school and at work, for example. Often children show symptoms of autism within the first year. A small number of children appear to develop normally in the first year, and then go through a period of regression between 18 and 24 months of age when they develop autism symptoms.
While there is no cure for autism spectrum disorder, intensive, early treatment can make a big difference in the lives of many children.
Symptoms
Some children show signs of autism spectrum disorder in early infancy, such as reduced eye contact, lack of response to their name or indifference to caregivers. Other children may develop normally for the first few months or years of life, but then suddenly become withdrawn or aggressive or lose language skills they have already acquired. Signs usually are seen by age 2 years.
Each child with autism spectrum disorder is likely to have a unique pattern of behavior and level of severity — from low functioning to high functioning.
Some children with autism spectrum disorder have difficulty learning, and some have signs of lower than normal intelligence. Other children with the disorder have normal to high intelligence — they learn quickly, yet have trouble communicating and applying what they know in everyday life and adjusting to social situations.
Because of the unique mixture of symptoms in each child, severity can sometimes be difficult to determine. It is generally based on the level of impairments and how they impact the ability to function.
Below are some common signs shown by people who have autism spectrum disorder.
Social communication and interaction
A child or adult with autism spectrum disorder may have problems with social interaction and communication skills, including any of these signs:
- Fails to respond to his or her name or appears not to hear you at times
- Resists cuddling and holding, and seems to prefer playing alone, retreating into his or her own world
- Has poor eye contact and lacks facial expression
- Does not speak or has delayed speech, or loses previous ability to say words or sentences
- Cannot start a conversation or keep one going, or only starts one to make requests or label items
- Speaks with an abnormal tone or rhythm and may use a singsong voice or robot-like speech
- Repeats words or phrases verbatim, but does not understand how to use them
- Does not appear to understand simple questions or directions
- Does not express emotions or feelings and appears unaware of others feelings
- Does not point at or bring objects to share interest
- Inappropriately approaches a social interaction by being passive, aggressive or disruptive
- Has difficulty recognizing nonverbal cues, such as interpreting other peoples facial expressions, body postures or tone of voice
- Patterns of behavior
- A child or adult with autism spectrum disorder may have limited, repetitive patterns of behavior, interests or activities, including any of these signs:
- Performs repetitive movements, such as rocking, spinning or hand flapping
- Performs activities that could cause self-harm, such as biting or head-banging
- Develops specific routines or rituals and becomes disturbed at the slightest change
- Has problems with coordination or has odd movement patterns, such as clumsiness or walking on toes, and has odd, stiff or exaggerated body language
- Is fascinated by details of an object, such as the spinning wheels of a toy car, but does not understand the overall purpose or function of the object
- Is unusually sensitive to light, sound or touch, yet may be indifferent to pain or temperature
- Does not engage in imitative or make-believe play
- Fixates on an object or activity with abnormal intensity or focus
- Has specific food preferences, such as eating only a few foods, or refusing foods with a certain texture
- As they mature, some children with autism spectrum disorder become more engaged with others and show fewer disturbances in behavior. Some, usually those with the least severe problems, eventually may lead normal or near-normal lives. Others, however, continue to have difficulty with language or social skills, and the teen years can bring worse behavioral and emotional problems.
When to see a doctor
Babies develop at their own pace, and many do not follow exact timelines found in some parenting books. But children with autism spectrum disorder usually show some signs of delayed development before age 2 years.
If you are concerned about your childs development or you suspect that your child may have autism spectrum disorder, discuss your concerns with your doctor. The symptoms associated with the disorder can also be linked with other developmental disorders.
Signs of autism spectrum disorder often appear early in development when there are obvious delays in language skills and social interactions. Your doctor may recommend developmental tests to identify if your child has delays in cognitive, language and social skills, if your child:
- Does not respond with a smile or happy expression by 6 months
- Does not mimic sounds or facial expressions by 9 months
- Does not babble or coo by 12 months
- Does not gesture — such as point or wave — by 14 months
- Does not say single words by 16 months
- Does not play "make-believe" or pretend by 18 months
- Does not say two-word phrases by 24 months
- Loses language skills or social skills at any age
