NREM
NREM (Non-Rapid Eye Movement)
NREM or Non-Rapid Eye Movement (pronounced: en-rem) is one of the two basic states of sleep. It is characterized by a lack of rapid eye movement and little dreaming.
Etymology
The term "NREM" is an acronym derived from "Non-Rapid Eye Movement". It was first used in the mid-20th century when researchers discovered the distinct stages of sleep.
Definition
NREM sleep is a state of sleep that is divided into three stages: N1, N2, and N3. Each stage represents a different level of sleep depth, with N3 being the deepest. During NREM sleep, the body repairs and regrows tissues, builds bone and muscle, and strengthens the immune system.
Related Terms
- Sleep: A naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, reduced muscle activity and inhibition of nearly all voluntary muscles.
- Rapid Eye Movement (REM): The stage of sleep during which the most vivid dreams occur. It is characterized by rapid eye movements, increased respiration rate, and increased brain activity.
- Sleep Cycle: The progression through the various stages of NREM and REM sleep.
- Sleep Deprivation: The condition of not having enough sleep. It can be either chronic or acute and may vary widely in severity.
- Insomnia: A sleep disorder that is characterized by difficulty falling and/or staying asleep.
See Also
External links
- Medical encyclopedia article on NREM
- Wikipedia's article - NREM
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