Sleep inertia
Sleep Inertia
Sleep inertia is a physiological state characterized by a decline in motor dexterity and a subjective feeling of tiredness immediately following an abrupt awakening. The impaired alertness may interfere with the ability to perform mental or physical tasks.
Pronunciation
- IPA: /sliːp ɪˈnɜːrʃə/
Etymology
The term "sleep inertia" originates from the Latin words "somnus" meaning sleep and "iners" meaning idle or sluggish.
Definition
Sleep inertia refers to the period of impaired performance and grogginess experienced after waking up. It can last between 1 to 4 hours, but typically dissipates after 15 to 30 minutes. It is more severe when a person is abruptly awakened during a deep sleep cycle or REM sleep.
Symptoms
Symptoms of sleep inertia can include a desire to return to sleep, grogginess, and reduced alertness and cognitive performance. These symptoms can be more severe if the individual was in the middle of a sleep cycle or in deep sleep when awakened.
Causes
Sleep inertia is caused by sudden awakening during non-REM sleep or REM sleep. It is more severe when awakening occurs during the deep stages of sleep. Other factors that can contribute to sleep inertia include sleep deprivation, irregular sleep schedules, and certain medications.
Related Terms
See Also
External links
- Medical encyclopedia article on Sleep inertia
- Wikipedia's article - Sleep inertia
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