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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 ...
Sleep deprivation has been shown to negatively affect picture classification speed and accuracy, as well as recognition memory. [7] It results in an inability to avoid attending to irrelevant information displayed during attention-related tasks. (Norton) It also decreases activation in the ventral visual area and the frontal parietal control ...
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]
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.
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 ...
But here's a twist you might not have considered: While we often think of the winter months as a time for more sleep, the shorter days might actually be messing with our sleep cycles in unexpected ...
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 ...
Narcolepsy: A chronic neurological disorder (or dyssomnia), which is caused by the brain's inability to control sleep and wakefulness. [94] Idiopathic hypersomnia: A chronic neurological disease similar to narcolepsy, in which there is an increased amount of fatigue and sleep during the day. Patients who have idiopathic hypersomnia cannot ...