Rapid eye movement (REM) sleep is defined as “active brain in an inactive body,” and takes place during the fifth stage of sleep. On the other hand, non rapid eye movement sleep (NREM) takes place in the first through fourth stages of sleep and is defined as an “inactive mind in an active body”. (5) Wait a second- our body can be active while sleeping? Indeed it can. In fact, there are a number of sleep disorders that take place during NREM sleep called parasomnia or arousal disorder. They activate the autonomic nervous system and motor systems during sleep and include sleepwalking, sleepeating, sleep-talking, teeth grinding, restless leg syndrome, somniloquy (sleep talking), and sleepsex (3).