• Thumbnail for Sleep cycle
    The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream...
    16 KB (1,804 words) - 01:55, 26 May 2025
  • Thumbnail for Rapid eye movement sleep
    verification][page needed] REM and non-REM sleep alternate within one sleep cycle, which lasts about 90 minutes in adult humans. As sleep cycles continue, they shift towards...
    70 KB (8,508 words) - 18:06, 17 July 2025
  • Thumbnail for Sleep
    regulate the sleep cycle. The most pronounced physiological changes in sleep occur in the brain. The brain uses significantly less energy during sleep than it...
    110 KB (12,791 words) - 04:11, 19 July 2025
  • Thumbnail for Circadian rhythm
    temperature and redox cycles. In clinical settings, an abnormal circadian rhythm in humans is known as a circadian rhythm sleep disorder. The earliest...
    112 KB (13,020 words) - 06:14, 28 July 2025
  • Sleep Cycle is the debut solo studio album by Animal Collective member Deakin (Josh Dibb), released on Bandcamp on April 6, 2016. That same day, "Just...
    7 KB (434 words) - 20:58, 15 September 2024
  • Thumbnail for Circadian rhythm sleep disorder
    sleep disorders (CRSD), also known as circadian rhythm sleep–wake disorders (CRSWD), are a family of sleep disorders that affect the timing of sleep....
    27 KB (3,137 words) - 19:13, 17 July 2025
  • Thumbnail for Sleep disorder
    times), sleeping sickness (disruption of the sleep cycle due to infection), sleepwalking, and night terrors. Sleep disruptions can be caused by various issues...
    73 KB (8,556 words) - 17:49, 18 July 2025
  • Thumbnail for Slow-wave sleep
    Slow-wave sleep (SWS), often referred to as deep sleep, is the third stage of non-rapid eye movement sleep (NREM), where electroencephalography activity...
    49 KB (5,698 words) - 08:29, 22 July 2025
  • Thumbnail for Sleep paralysis
    by sleep deprivation, psychological stress, or abnormal sleep cycles. The underlying mechanism is believed to involve a dysfunction in REM sleep. Diagnosis...
    48 KB (5,537 words) - 19:59, 30 June 2025
  • delta sleep, or slow-wave sleep. Delta sleep occurs most often during the first half of a sleep cycle, which indicates that people with more delta-sleep activity...
    30 KB (3,453 words) - 22:03, 15 July 2025
  • Thumbnail for Non-24-hour sleep–wake disorder
    not align with the natural light–dark cycle. Non-24-hour sleep–wake disorder causes a person's sleep–wake cycle to move around the clock every day, to...
    52 KB (6,326 words) - 09:51, 18 July 2025
  • Polyphasic sleep or segmented sleep is the system of sleeping during multiple periods over the course of 24 hours, in contrast to monophasic sleep, a single...
    28 KB (3,086 words) - 13:57, 1 August 2025
  • inarticulate, speeches. It can occur many times during a sleep cycle and during both NREM and REM sleep stages, though, as with sleepwalking and night terrors...
    12 KB (1,435 words) - 02:27, 11 July 2025
  • Thumbnail for Infant sleep
    Infant sleep is an act of sleeping by an infant or a newborn. It differs significantly from sleep during adulthood. Unlike in adults, sleep early in infancy...
    8 KB (1,000 words) - 19:07, 25 July 2025
  • Thumbnail for Sleep in animals
    mammals engaged in polyphasic sleep, dividing sleep into multiple bouts per day. Higher daily sleep quotas and shorter sleep cycles in polyphasic species as...
    66 KB (7,982 words) - 07:50, 15 July 2025
  • Thumbnail for Psychological stress and sleep
    get 7 to 9 hours of sleep each night. Sleep is regulated by an internal process known as the circadian rhythm. This 24-hour cycle regulates periods of...
    29 KB (3,751 words) - 18:03, 17 July 2025
  • rest–activity cycle (BRAC) is a physiological arousal mechanism in humans proposed by Nathaniel Kleitman, hypothesized to occur during both sleep and wakefulness...
    4 KB (474 words) - 20:36, 11 July 2025
  • Hypnic jerk (redirect from Sleep start)
    Transmission, a hypnic jerk occurs during the non-rapid eye movement sleep cycle and is an "abrupt muscle action flexing movement, generalized or partial...
    12 KB (1,371 words) - 21:07, 30 May 2025
  • to: Übermensch, Friedrich Nietzsche's Superman Uberman's sleep schedule, a polyphasic sleep cycle Oberman, a surname Obermann, another surname Ooberman,...
    256 bytes (56 words) - 12:50, 28 December 2024
  • Thumbnail for Delayed sleep phase disorder
    timing of biological rhythms including sleep, peak period of alertness, core body temperature, and hormonal cycles. People with this disorder are often...
    62 KB (7,812 words) - 16:18, 17 July 2025
  • Thumbnail for Familial natural short sleep
    and short of the 'short sleep' gene | Sleep Cycle". Sleep Cycle alarm clock. 2022-02-03. Retrieved 2022-10-15. "Short sleep, familial natural, 1 - NIH...
    28 KB (2,864 words) - 21:48, 17 July 2025
  • Thumbnail for Sleep deprivation
    Sleep deprivation, also known as sleep insufficiency or sleeplessness, is the condition of not having adequate duration and/or quality of sleep to support...
    133 KB (14,925 words) - 17:16, 31 July 2025
  • Thumbnail for Neuroscience of sleep
    neuroscience of sleep is the study of the neuroscientific and physiological basis of the nature of sleep and its functions. Traditionally, sleep has been studied...
    124 KB (15,773 words) - 06:40, 19 July 2025
  • Thumbnail for Deakin (musician)
    fourteen studio albums. In 2016, he made his solo debut with the album Sleep Cycle. He also occasionally works as a carpenter during musical down time....
    15 KB (1,251 words) - 04:16, 29 July 2025
  • Thumbnail for Sleepwalking
    Sleepwalking (redirect from Sleep walking)
    slow-wave sleep (N3) of non-rapid eye movement sleep (NREM sleep) cycles. It typically occurs within the first third of the night when slow-wave sleep is most...
    52 KB (6,084 words) - 21:44, 26 July 2025
  • Caffeine reduces slow-wave sleep in the early part of the sleep cycle and can reduce rapid eye movement sleep later in the cycle. Caffeine increases episodes...
    15 KB (1,759 words) - 18:57, 25 May 2025
  • Thumbnail for Hypnogram
    Hypnogram (category Sleep medicine)
    during the sleep cycle. NREM sleep can be further classified into NREM stage 1, 2 and 3. The previously considered 4th stage of NREM sleep has been included...
    10 KB (1,305 words) - 12:51, 12 September 2023
  • Thumbnail for Narcolepsy
    Narcolepsy (redirect from Paroxysmal sleep)
    that impairs the ability to regulate sleep–wake cycles, and specifically impacts REM (rapid eye movement) sleep. The symptoms of narcolepsy include excessive...
    72 KB (8,174 words) - 02:13, 26 July 2025
  • Thumbnail for Brainstem
    include the regulation of the central nervous system and the body's sleep cycle. It is also of prime importance in the conveyance of motor and sensory...
    24 KB (2,813 words) - 02:06, 31 May 2025
  • Sleep Wake Cycle or Irregular Sleep Wake Schedule, and Irregular Sleep Wake Disorder (ISWD). Sometimes the words sleep and wake are hyphenated (sleep-wake)...
    11 KB (1,162 words) - 06:56, 4 July 2025