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Autism is known as a complex developmental disability. Experts believe that Autism presents itself during the first three years of a person's life. The condition is the result of a neurological disorder that has an effect on normal brain function, affecting development of the person's communication and social interaction skills.

People with autism have issues with non-verbal communication, a wide range of social interactions, and activities that include an element of play and/or banter.

Genomic research is beginning to discover that people with autism spectrum disorders probably share genetic traits with individuals with ADHD (attention-deficit hyperactivity disorder), bipolar disorder, schizophrenia, or clinical depression. A team at the Cross Disorders Group of the Psychiatric Genomic Consortium suggests that the five mental disorders and illnesses have the same common inherited genetic variations.

ASD stands for Autism Spectrum Disorder and can sometimes be referred to as Autistic Spectrum Disorder. In this text Autism and ASD mean the same. ASDs are any developmental disabilities that have been caused by a brain abnormality. A person with an ASD typically has difficulty with social and communication skills.

A person with ASD will typically also prefer to stick to a set of behaviors and will resist any major (and many minor) changes to daily activities. Several relatives and friends of people with ASDs have commented that if the person knows a change is coming in advance, and has time to prepare for it; the resistance to the change is either gone completely or is much lower.

Autism (or ASD) is a wide-spectrum disorder. This means that no two people with autism will have exactly the same symptoms. As well as experiencing varying combinations of symptoms, some people will have mild symptoms while others will have severe ones. Below is a list of the most commonly found characteristics identified among people with an ASD.

The way in which a person with an ASD interacts with another individual is quite different compared to how the rest of the population behaves. If the symptoms are not severe, the person with ASD may seem socially clumsy, sometimes offensive in his/her comments, or out of synch with everyone else. If the symptoms are more severe, the person may seem not to be interested in other people at all.

It is common for relatives, friends and people who interact with someone with an ASD to comment that the ASD sufferer makes very little eye contact. However, as health care professionals, teachers and others are improving their ability to detect signs of autism at an earlier age than before, eye contact among people with autism is improving. In many cases, if the symptoms are not severe, the person can be taught that eye contact is important for most people and he/she will remember to look people in the eye.

A person with autism may often miss the cues we give each other when we want to catch somebody's attention. The person with ASD might not know that somebody is trying to talk to them. They may also be very interested in talking to a particular person or group of people, but does not have the same skills as others to become fully involved. To put it more simply, they lack the necessary playing and talking skills.

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What is Autism? What Causes Autism? - Medical News Today