Sleepwalking and enuresis occur in which stage of sleep cycle?

Correct option is D

Ans. (d) Sol. Sleepwalking (somnambulism) and enuresis (bedwetting) typically occur during deep NREM sleep, specifically in stage 4. This is the stage of the sleep cycle associated with the deepest and most restorative sleep.
Explanation of each option:
· (a) Rapid Eye Movement (REM) sleep – Incorrect. REM sleep is associated with vivid dreaming, not sleepwalking or enuresis.
· (b) Non-Rapid Eye Movement (NREM) sleep stage 1 – Incorrect. Stage 1 is the lightest stage of sleep, and sleepwalking or enuresis does not typically occur here.
· (c) NREM sleep stage 2 – Incorrect. Stage 2 is characterized by light sleep with occasional sleep spindles, but it is not typically associated with sleepwalking or enuresis.
· (d) NREM sleep stage 4 – Correct. Stage 4 is the deepest phase of NREM sleep, where the body is least responsive to external stimuli, and sleepwalking and enuresis can occur.