<prompt> Sleep walking is seen in which stage of sleep ?REMStage 1-2 NREMStage 2-3 NREMStage 3-4 NREM  <response>: Impoant events occuring during sleep Deep sleepslow wave sleep disorder : - These events occur during stage 3 4 of NREM. Impoant disorders are : Somnambulism Night walking : - Patient walks during sleep. Sleep terror or night terrors pavor nocturnes : - The patient suddenly gets up screaming, with autonomic arousal tachycardia, sweating. Sleep terrors are rarely remembered in the morning in contrast to night mares. No treatment is required only reassurance is required. However, in severe cases benzodiazepine can be used. Sleep-related enuresis Nocturnal enuresisbed wetting : - Repetitive voiding occurs during sleep. First line of treatment is behaviour therapy. If behavioral therapy fails, desmopressin DOC and Imipramine can be used. Bruxism Teeth grinding Sleep-talking Somniloquy. Ref: Guyton 12th Ed. 