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deep sleep. There is a greater amount of deep sleep (stage N3) earlier in the night, while the proportion of REM sleep increases in the two cycles just before...

Sexsomnia, also known as sleep sex, is a distinct form of parasomnia, or an abnormal activity that occurs while an individual is asleep. Sexsomnia is characterized...

movement sleep (REM sleep or REMS) is a unique phase of sleep in mammals (including humans) and birds, characterized by random rapid movement of the eyes...

Sleep apnea is a sleep-related breathing disorder in which repetitive pauses in breathing, periods of shallow breathing, or collapse of the upper airway...

Sleep Token are a British rock band from London, formed in 2016. The group are an anonymous, masked collective led by a frontman using the moniker Vessel...

Sleep deprivation, also known as sleep insufficiency or sleeplessness, is the condition of not having adequate duration and/or quality of sleep to support...

Go the Fuck to Sleep is a satirical book written by American author Adam Mansbach and illustrated by Ricardo Cortés. Described as a "children's book for...

assess the sleep hygiene of people with insomnia and other conditions, such as depression, and offer recommendations based on the assessment. Sleep hygiene...

Team Sleep is an American experimental alternative rock/post-rock group led by singer/guitarist Chino Moreno. Moreno is better known for fronting the Sacramento-based...

A sleep pod, also known as nap pod, napping pod, or nap capsule, is a special type of structure or chair that allows people to nap. Users use the pods...

Doctor Sleep is a 2019 American supernatural horror film edited, written and directed by Mike Flanagan. It is an adaptation of the 2013 novel of the same...

Delayed sleep phase disorder (DSPD), more often known as delayed sleep phase syndrome and also as delayed sleep–wake phase disorder, is the delaying of a person's...

The Big Sleep (1939) is a hardboiled crime novel by American-British writer Raymond Chandler, the first to feature the detective Philip Marlowe. It has...

Somniloquy, commonly referred to as sleep-talking, is a parasomnia in which one speaks aloud while asleep. It can range from simple mumbling sounds to...

circadian rhythm sleep disorder. The earliest recorded account of a circadian process is credited to Theophrastus, dating from the 4th century BC, probably...

The neuroscience of sleep is the study of the neuroscientific and physiological basis of the nature of sleep and its functions. Traditionally, sleep has...

Sleep medicine is a medical specialty or subspecialty devoted to the diagnosis and therapy of sleep disturbances and disorders. From the middle of the...

"Sleeping Beauty" (French: La Belle au bois dormant, or The Beauty Sleeping in the Wood; German: Dornröschen, or Little Briar Rose), also titled in English...

movement sleep (NREM), also known as quiescent sleep, is, collectively, sleep stages 1–3, previously known as stages 1–4. Rapid eye movement sleep (REM)...

Sleep is a 2013 horror novel by American writer Stephen King and the sequel to his 1977 novel The Shining. The book reached the first position on The...