It's not clear why even modest amounts of alcohol may shrink the brain, although alcohol is "known to dehydrate tissues, and constant dehydration can have negative effects on any sensitive tissue," says Paul.

So a new study draws a correlation between how much you drink (over your lifetime) and the size of your brain. The more you drink the smaller it gets. I didn't realize dehydration can shrink your brain. Maybe that explains my memory loss - I'm horrible at staying hydrated because I hate drinking water and soda is off limits. (is/was - same deal :))

there was a point to this post but i've forgotten it.