This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Which one of the following phenomenon is closely associated with slow wave sleep - 
Select and explain. 
A. Dreaming, B. Sleep walking, C. Atonia, D. Irregular heart rate
B: Sleep walking
Answer: B: Sleep walking 
Explanation: Slow wave sleep (stage 3 & 4 of NREM sleep) disorders:- Sleepwalking (somnambulism), night tenor (sleep terror or pavomoctumus), Nocturnal enuresis, Bruxism (teeth grinding), and sleep talking (somniloquy).
REM sleep events/disorder :- Nightmares, nocturnal penile tumescence, Narcolepsy.