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Autism is a neurodevelopmental disorder characterized by 3 main areas of dysfunction:
- Language and communication
- Social interaction and perceptiveness
- Behavior
Autism usually has its onset before the age of 3. A typical child with autism has difficulties communicating his or her needs either verbally or nonverbally. Not only is verbal expression (speech) affected but comprehension (i.e. receptive language) is impaired as well. An early clue that an infant may have autism is lack of pointing by the age of 1.
As far are social interaction, children with autism appear to lack the ability to interact appropriately. Social cues are often difficult for them to grasp. They may not understand the concept of personal space. Early on, children with autism may not appear to be affectionate, although many exceptions exist.
Behavior may be severely affected. Children may have prolonged tantrums out of the blue or out of proportion to a triggering event. Children with autism may have recurrent episodes of rocking, hand flapping, looking from the corner of their eyes, toe walking and other repetitive behaviors known as self-stimulatory behaviors. The behaviors (like tics in children with Tourette's syndrome) may be exacerbated in times of stress, fatigue, or infection. These are involuntary movements, although they may temporarily be suppressed.
Apart from the main characteristics mentioned above, children with autism often have sensory processing disturbances. Many children with autism especially when they are young may appear deaf. These children may however actually have hyperacute hearing. Many children have deficits caused by difficulties processing information that has been seen, heard, or experienced tactily (i.e via touch). There are often distortions in sensory input that range from mild to severe. A regular door bell sound for instance, may sound like a very loud and annoying blast. A simple hug may feel very uncomfortable and cause some distress. Sensory processing disturbances, especially auditory ones, when present, can contribute to language as well as behavioral disturbances in children with autism.
Many children with autism have seizures that can be obvious (generalized tonic-clonic or 'grand mal' spells where the whole body shakes vigorously) or subtle (such as a blank stare with altered responsiveness). Seizures should always be assessed. This is done by obtaining an EEG (brain wave test).
Finally, many children with autism have some evidence of impaired immune function as demonstrated by recurrent infections (e.g. ear infections or other upper respiratory problems). Many children with autism also have gastrointestinal disturbances ranging from diarrhea to constipation. A significant problem is that of nutrition. Many children are picky eaters, especially when it comes to nutritious foods. Chicken nuggets and fries seem to be tolerated no matter how picky the child is.
Appropriate treatment of autism entails a recognition of all of the above problems and treating them thoroughly.
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