Xenization wrote:
We don't know exactly what causes autism (although there are many theories--see the other posters' replies), but its generally agreed that its a heterogeneous condition.
The theory I believe to be correct is the nonregulation of the UBE3A enzyme because of farely new information that geneticists have uncorvered. In short, the UBE3A engyme targets and breaks down proteins in the brain. What I believe is the Autism sparker is that the UBE3A enzyme isn't being regulated because of at least 1,000 gene mutations. That's about all the information I know of this theory but I am lead to believe that the proteins the enzyme destroys regulate the way the frontal lobe acts. The frontal lobe is responsible for things such as anxiety, sense of fear, motor coordination(along with the cerebellum), speech, and more.