Sleep onset latency
Sleep onset latency (pronounced: /ˈsliːp ˈɒnˌsɛt ˈlætənsi/) is a term used in sleep science to describe the length of time that it takes for an individual to transition from full wakefulness to sleep.
Etymology
The term "sleep onset latency" is derived from the English words "sleep" (from Old English slēp), "onset" (from Old English onsettan), and "latency" (from Latin latens meaning "lying hidden").
Definition
Sleep onset latency is typically measured in minutes and is considered to be the period from the moment an individual attempts to fall asleep until they actually fall asleep. It is a key metric used in polysomnography, the study of sleep, and is often used to diagnose sleep disorders such as insomnia or hypersomnia.
Related Terms
- Polysomnography: A type of sleep study that records your brain waves, oxygen levels in your blood, heart rate and breathing, as well as eye and leg movements during the study.
- Insomnia: A sleep disorder that is characterized by difficulty falling and/or staying asleep.
- Hypersomnia: A condition characterized by excessive sleepiness, regardless of how much sleep an individual gets at night.
- Sleep Efficiency: The percentage of time spent asleep while in bed.
- Sleep Architecture: The basic structural organization of normal sleep.
See Also
External links
- Medical encyclopedia article on Sleep onset latency
- Wikipedia's article - Sleep onset latency
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