How Can Dreams Control Your Body? The Science Of SleepwalkingEsther Inglis-Arkell9/30/14 2:18pm295EditPromoteGo to permalink Sleepwalking is equal parts fascinating and terrifying. The notion we can be in control of our bodies without having any responsibility for what we do is incredibly unnerving. But what actually happens in your brain (and your body) when you sleepwalk? Here's what science has found out.