“…Somnambulism (sleepwalking) typically arises from stage N3. Behaviors range from simple acts (eg, gesturing, pointing, walking around the bedroom) to more complex behaviors (eg, running away from imaginary threats, getting dressed, cooking, and even 49 Population and twin studies indicate that genetic factors are important in the etiology of sleepwalking. 50,51 In predisposed individuals, sleepwalking is believed to be precipitated by factors that increase pressure for deep sleep (eg, sleep deprivation, intense exercise in the evening, fever) and/or factors that cause sleep fragmentation (eg, arousing stimuli, stress).…”