There was an article in this month's PCGamer that I was reading. It apparently uses the very small twitches in your muscles when you think of something to determine what you want to do.

You can't actually just think 'shoot' to shoot, and 'jump' to jump. The guy doing the review in PCGamer had it set up to do different actions for his different levels of concentration. Eg. He would concentrate mildly to walk forwards, a bit more to shoot, and concentrate a lot to jump. Doesn't seem like much control, I think ill stick to mouse and keyboard.