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Non-REM sleep occurs first and after a transitional period is called slow-wave sleep or deep sleep. During this phase, body temperature and heart rate fall, and the brain uses less energy. [10] REM sleep, also known as paradoxical sleep, represents a smaller portion of total sleep time.
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- Dream
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- Sleep Cycle
Sample hypnogram showing one sleep cycle (the first of the...
- Sleep (Disambiguation)
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- Nap
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- Non-Rapid Eye Movement
Non-rapid eye movement sleep (NREM), also known as quiescent...
- Sleep Debt
Non-rapid eye 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) is not included. There are distinct electroencephalographic and other characteristics seen in each stage.
Κατά τη διάρκεια του ύπνου στα στάδια REM και non REM (NREM) γίνεται ένας αριθμός σημαντικών διαδικασιών που έχει ως σκοπό να υποστηρίξει την υγιή λειτουργία όχι μόνο του εγκεφάλου, αλλά και της συνολικής σωματικής υγείας.
3 Αυγ 2023 · There are five different sleep stages, including REM (rapid eye movement) and NREM (non-rapid eye movement) sleep. The five stages make one sleep cycle, which usually repeats every 90 to 110 minutes. Stage 1 non-REM sleep marks the transition from wakefulness to sleep.
Humans possess both slow wave and REM sleep, in both phases both eyes are closed and both hemispheres of the brain involved. Sleep has also been recorded in mammals other than humans. One study showed that echidnas possess only slow wave sleep (non-REM).
There are two types of sleep, non-rapid eye-movement (NREM) sleep and rapid eye-movement (REM) sleep. NREM sleep is divided into stages 1, 2, 3, and 4, representing a continuum of relative depth. Each has unique characteristics including variations in brain wave patterns, eye movements, and muscle tone.
A period of sleep characterized by decreased metabolic activity, slowed breathing and heart rate, and the absence of dreaming. Non-REM sleep occurs in the first four of the five stages of the sleep cycle, followed by REM sleep, during which dreaming occurs. Also called NREM sleep, orthodox sleep.
