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The fatigue-model is supported by subjective self-report and physiological studies. Arousal, as measured by electroencephalograph (EEG), decreases as sleep loss increases, [6] leading to a decrease in the desire to perform and exert effort.
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 ...
Sleep deprivation, whether total or not, can induce significant anxiety, and longer sleep deprivations tend to result in an increased level of anxiety. [61] Sleep deprivation has also shown some positive effects on mood and can be used to treat depression. [10] Chronotype can affect how sleep deprivation influences mood.
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 debt or sleep deficit is the cumulative effect of not getting enough sleep. A large sleep debt may lead to mental or physical fatigue, and can adversely affect one's mood, energy, and ability to think clearly. There are two kinds of sleep debt: the result of partial sleep deprivation, and of total sleep deprivation
The problem with the assessment is that patients may only report the consequences of sleepiness: loss of energy, fatigue, weariness, difficulty remembering or concentrating, etc. It is crucial to aim for objective measures to quantify the sleepiness. A good measurement tool is the multiple sleep latency test (MSLT).
MS fatigue has been found to not correlate with sleep duration, but there was some correlation with insomnia and sleep quality. [148] It may be that primary MS fatigue is unaffected by sleep characteristics, but that sleep deprivation correlates with secondary MS fatigue. [149]
For people who do not sleep well, bedtime is an abominable time. Sleep can become a task and a burden that increases people's worry about getting enough sleep, leading to nervousness, and increases their psychological stress. This can lead to a variety of negative health outcomes, including fatigue, mood swings, and difficulty concentrating. [22]
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