Autism spectrum disorder is a complex neuro-developmental disorder which is inborn or which occurs in the first years the child. It is thought to be caused by some nervous system problems that affect the structure and functioning of the brain. It has not yet known what causes autism spectrum disorder, but there are some genetically based findings. However, it is not known which genes are responsible for this disorder. There are some arguments that environmental factors can also set off autism. Numerous studies have been made about the effects of both genetic resources and environmental factors.
Scientific research has shown that autism spectrum disorder is not related to parenting characteristics or socio-economic characteristics of the family. The characteristics of childbearing or the economic conditions of the family are not inside the environmental factor causing autism. Namely, autism spectrum disorder can be seen in every kind of society, in different geographies, inside different races and families.
According to the reports of the Centers for Disease Control Prevention, autism has been the most common neurological disorder in the world. There has been an increase in the rate of the children having autism. In 2006, autism was seen in 1 child out of every 150 children, this rate become 1 children in every 88 children in 2012. And finally it was reported that one out of every 68 children has autism in 2014. In addition, the prevalence of autism in males is 4.3 times higher than females.
Autism spectrum disorder is thought to originate from neurological causes. A significant proportion of the autism diagnosed individuals, it is approximately 35% may have seizure, involuntary movements, loss of consciousness due to abnormal electrical movements in the brain. Autism spectrum disorder is not a mental illness, but the symptoms may resemble some mental illness.
Most of the people think the children having autism spectrum disorder have superior intelligence. In fact, reality is different from the common belief. The majority of individuals diagnosed with autism spectrum disorder have mental retardation at different levels. About 10 percent of the people with autistic spectrum disorders have superior properties like very strong memory and musical ability.
Difficulties in communication and interaction in public, inability to have eye contact, difficulties in expressing emotions, limiting and repetitive behaviors, regular and repetitive motor movements, insistence in doing the same things and strict adherence to routine, having limited and intense interest area, less sensual arousal have been among the most common symptoms of autistic spectrum disorders.