|group4= Benignphenomena
|list4 = Dream Exploding head syndrome False awakening Hypnagogia Hypnic jerk Lucid dream Nightmare Nocturnal emission Nocturnal penile tumescence Sleep paralysis Somnolence
|group5= Relatedtopics
|list5 = Bed (Bunk bed, Four poster bed, Futon, Daybed, Hammock, Mattress, Sleeping bag) Bed bug Bedding Bedroom Bedtime Bedtime toy Bedtime story Caffeine nap Chronotype Dream journal Hypnopompic state LullabyMethods of falling asleep Microsleep Nap Nightwear Polyphasic sleep Polysomnography Power nap Second wind Siesta Sleep and creativity Sleep and learning Sleep ...