Non-REM sleep
| Non-REM sleep | |
|---|---|
| Term | Non-REM sleep |
| Short definition | Non-ionizing radiation - (pronounced) (Not-I-uh-NY-zing RAY-dee-AY-shun) type of low-energy radiation that does not have enough energy to remove an electron (negative particle) from an atom or molecule. Non-ionizing radiation includes visible, infrared, and ultraviolet light; microwaves; radio waves; and radio frequency energy from cell phones. |
| Type | Cancer terms |
| Specialty | Oncology |
| Language | English |
| Source | NCI |
| Comments | |
Non-REM sleep - The phase of sleep known as the quiet or restful phase. During the three stages of non-REM sleep, a person falls asleep and then transitions from light sleep to deep sleep. This occurs when a person's brain activity, breathing, and heart rate slow down, body temperature drops, muscles relax, and eye movements stop. Non-REM sleep plays an important role in helping the body repair tissues, build bones and muscles, and boost its immune system. During normal sleep, a person goes through four to five sleep cycles, each lasting about 90 minutes, which include both non-REM sleep and REM sleep. Also called non-rapid eye movement sleep and NREM sleep
External links
- Medical encyclopedia article on Non-REM sleep
- Wikipedia's article - Non-REM sleep
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