What Caffeine Actually Does to Your Brain

"...Right off the bat, it's worth stating again: the human brain, and caffeine, are nowhere near totally understood and easily explained by modern science. That said, there is a general consensus on how a compound found all over nature, caffeine, affects the mind..."Welcome to Lifehacker:http://i.lifehacker.com/5585217/what-caffeine-actually-does-to-your-brain