Can someone explain the Connectivity Theory of Autism?

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I have just come across this theory of autism, and I was wondering if someone had a good explanation of it - the underconnectivity vs areas of overconnectivity in an autistic brain and how it explains certain traits of autism?

Thanks

I can't provide much but I saw the show "Through the Wormhole" recently and they said autistics had under-connectivity on the left side and by compensation, over compensation on the right, giving a greater attention to detail. I might have the sides mixed up.

If you Google "intense world" theory, you will probably find some stuff in that relating to it. In fact: http://www.wrongplanet.net/article419.html

Oh I get it, so it is just another term for the Intense World theory?

It might not be quite the same thing, but must certainly be related research:

"The theory predicts that there are three factors in the cause of autism; a genetic predisposition, a toxic insult during pregnancy and environmental exposure after birth. Our genes normally switch on an off in a well-timed and precise sequence like the playing of a piece of music throughout life. Autism is a triggered acceleration of this cascade of gene expression during brain development. We believe toxins during pregnancy trigger this acceleration. Many possible genetic mutations can lower the threshold for triggering the accelerated cascade. Environmental exposure that normally accelerates brain development accelerates brain development even further in autistics making the brain too sensitive, too early."