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Sleep inertia is a physiological state of impaired cognitive and sensory-motor performance that is present immediately after awakening. It persists during the transition of sleep to wakefulness, where an individual will experience feelings of drowsiness, disorientation and a decline in motor dexterity.
A confusional arousal (also known as sleep drunkenness or severe sleep inertia) is medical condition where a person awakened from sleep shows mental confusion for at least several minutes. [ 1 ] [ 2 ] Complete or partial amnesia of the episodes may be present.
What does sleep inertia feel like? Sleep inertia is impaired cognitive and physical function immediately after waking. It may feel like grogginess, sluggishness, drowsiness, and trouble thinking ...
There are no benefits to oversleeping and it can result in sleep inertia, which is the feeling of drowsiness for a period of time after waking. There are two phases of sleep: rapid eye movement (REM) and Non-REM sleep (NREM). [18] REM sleep is the less restful stage in which one dreams and experiences muscle movements or twitches.
Waking up tired is often due to sleep inertia, but sleep environment and habits also play a part. Here, doctors provide tips for waking up refreshed. Skip to main content. 24/7 Help ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 12 January 2025. Short period of sleep during typical waking hours For other uses, see Nap (disambiguation). A man napping in a hammock, on a patio in Costa Rica A nap is a short period of sleep, typically taken during daytime hours as an adjunct to the usual nocturnal sleep period. Naps are most often ...
This phenomenon has been called "sleep inertia." After sleep deprivation there is usually a sharp rebound of SWS, suggesting there is a "need" for this stage. [20] Slow Wave Sleep (SWS) is a highly active state unlike a state of brain quiescence as previously thought.
4. Upgrade Your Sleep Environment. Sleep environment can greatly impact sleep quality. For example, studies show that room temperature plays a critical role in circadian rhythm (the body’s ...