| Autism is the most characteristic condition of the | | | | occurrence of these disorders of both genetically and |
| autistic spectrum disorders and is defined by impaired | | | | environmental factors. A series of genes on the |
| social interaction, obsessive and narrow interests, | | | | chromosomes have been identified to be connected |
| repetitive actions and difficulties in verbal and | | | | to the causes of autism. Also irregularities in certain |
| nonverbal communication. Children with autism are | | | | brain areas have been matched to these type of |
| mostly diagnosed at the age of 3 when they show | | | | disorders. According to some particular studies, an |
| symptoms of an increased sensitivity to sound, light | | | | important trigger of autistic disorders is a low level of |
| and touch and decreased sensation of pain. They | | | | neurotransmitters like serotonin in the brain tissues. |
| avoid other children, resost cuddling, cannot | | | | The genes responsible for the growth and interaction |
| understand other personâs needs and | | | | of the brain tissues and neurons could be blamed for |
| feelings. | | | | an abnormal intrauterine development leading to later |
| The exact causes of autism are not yet known to | | | | manifestations of some fetal life problems. |
| scientists but they tend to incriminate for the | | | | |