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Somnolence (alternatively sleepiness or drowsiness) is a state of strong desire for sleep, or sleeping for unusually long periods (compare hypersomnia). It has distinct meanings and causes. It has distinct meanings and causes.
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 ...
Postprandial somnolence (colloquially known as food coma, after-dinner dip, or "the itis") is a normal state of drowsiness or lassitude following a meal. Postprandial somnolence has two components: a general state of low energy related to activation of the parasympathetic nervous system in response to mass in the gastrointestinal tract , and a ...
Excessive daytime sleepiness (EDS) is characterized by persistent sleepiness and often a general lack of energy, even during the day after apparently adequate or even prolonged nighttime sleep.
Lethargy is a state of tiredness, sleepiness, weariness, fatigue, sluggishness, or lack of energy. It can be accompanied by depression , decreased motivation, or apathy . Lethargy can be a normal response to inadequate sleep, overexertion, overworking, stress, lack of exercise, improper nutrition, drug abuse, boredom , or a symptom of an ...
It is not to be confused with fatigue, which is a normal physiological state. [4] Daytime sleepiness appears most commonly during situations where little interaction is needed. [5] Since hypersomnia impairs patients' attention levels (wakefulness), quality of life may be impacted as well. [6]
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Patients with sleep deprivation may present with complaints of symptoms and signs of insufficient sleep, such as fatigue, sleepiness, drowsy driving, and cognitive difficulties. Sleep insufficiency can easily go unrecognized and undiagnosed unless patients are specifically asked about it by their clinicians.