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Sleep disorder, a medical disorder of the sleep patterns; Rheum, the thin mucus discharged from the eyes, nose, or mouth during sleep; Sleepy Creek, a tributary of the Potomac River, U.S. Sleepy Hollow (disambiguation) Sleepy time (disambiguation) or Sleepytime
In individuals deprived of sleep, somnolence may spontaneously dissipate for short periods of time; this phenomenon is the second wind, and results from the normal cycling of the circadian rhythm interfering with the processes the body carries out to prepare itself to rest. The word "somnolence" is derived from the Latin "somnus" meaning "sleep".
Fatigue in a medical context is used to cover experiences of low energy that are not caused by normal life. [2] [3]A 2021 review proposed a definition for fatigue as a starting point for discussion: "A multi-dimensional phenomenon in which the biophysiological, cognitive, motivational and emotional state of the body is affected resulting in significant impairment of the individual's ability to ...
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.
Individuals who feel sleepy and wish to maintain alertness often consume over-the-counter stimulants such as caffeine in coffee. More specifically, it has been shown that high-frequency low-dose caffeine intake is effective at countering poor work performance effects due to extended wakefulness, confirming the hypothesis that adenosine is a ...
Sleep is 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 during rapid eye movement (REM) sleep, [1] and reduced interactions with surroundings. [2]
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This is a list of English auxiliary verbs, i.e. helping verbs, which include Modal verbs and Semi-modal verbs. See also auxiliary verbs, light verbs, ...