<prompt> True about REM sleep isNight maresNight terrorSomniloquyNone  <response>: ParasomniasParasomnias are dysfunctions or episodic nocturnal events occurring with sleep, sleep stages or paial arousals. Most parasomnias are common in childhood though they may persist into adulthood.Stage 4 Sleep Disorders:These disorders occur during deep sleep, i.e. Stages 3 and 4 of NREM-sleep.Nightmares which occur during REM sleep are clearly remembered in the morning. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 140 