<prompt> Benzodiazepines are used in treatment of somnambulism, as they-Increase the duration of NREM III and IVIncrease the duration of REM sleepDecrease the duration of NREM III and IVDecrease the duration of REM sleep  <response>: Somnambulism Sleep walking Usually seen in children. disorder of NREM sleep No treatment is required in most of the cases ,as it remits itself. BZDs are used if the symptoms are severe as the duration of Stage 2 is increased and that of Stage 3 and 4 is decreased, in which somnambulism is seen. 