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It can be caused by another disorder, by changes in the sleep environment, by the timing of sleep, severe depression, or by stress. Its consequences – sleepiness and impaired psychomotor performance – are similar to those of sleep deprivation. [102] Acute insomnia is the inability to consistently sleep well for a period of less than a month ...
Fatal insomnia is an extremely rare neurodegenerative prion disease that results in trouble sleeping as its hallmark symptom. [2] The majority of cases are familial (fatal familial insomnia [FFI]), stemming from a mutation in the PRNP gene, with the remainder of cases occurring sporadically (sporadic fatal insomnia [sFI]).
Participants who were sleep deprived following the initial training showed no improvement on trials the next day, while those who received sleep showed significant positive changes. [45] Studies such as these clearly demonstrate the disruptive influence sleep deprivation has on memory consolidation of procedural and declarative memories.
Few studies have compared the effects of acute total sleep deprivation and chronic partial sleep restriction. [8] A complete absence of sleep over a long period is not frequent in humans (unless they have fatal insomnia or specific issues caused by surgery); it appears that brief microsleeps cannot be avoided. [12]
They also show lower sleep propensity after total sleep deprivation than do normal sleepers. [6] Non-24 can begin at any age, not uncommonly in childhood. It is sometimes preceded by delayed sleep phase disorder. [7] Most people with this disorder find that it severely impairs their ability to function in school, in employment, and in their ...
Occasional noncircadian days may occur (i.e., sleep is "skipped" for an entire day and night plus some portion of the following day), followed by a sleep period lasting 12 to 18 hours. The symptoms do not meet the criteria for any other sleep disorder causing inability to initiate sleep or excessive sleepiness.
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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. EDS can be considered as a broad condition encompassing several sleep disorders where increased sleep is a symptom, or as a symptom of another ...