Rat brains are used to discover how the human brain works, assuming that comparison is valid. This study involves suddenly stopping an action :-http://www.sciencedaily.com/releases/2015/09/150917135227.htm-"You're about to drive through an intersection when the light suddenly turns red. But you're able to slam on the brakes, just in time.-"Johns Hopkins University researchers, working with scientists at the National Institute on Aging, have revealed the precise nerve cells that allow the brain to make this type of split-second change of course. In the latest issue of the journal Nature Neuroscience, the team shows that these feats of self-control happen when neurons in the basal forebrain are silenced."