segunda-feira, 23 de julho de 2012

F#432

Sleep deprivation is the condition of not having enough sleep; it can be either chronic or acute. A chronic sleep-restricted state can cause fatigue, daytime sleepiness, clumsiness and weight loss or weight gain.[1] It adversely affects the brain and cognitive function.[2]Few studies have compared the effects of acute total sleep deprivation and chronic partial sleep restriction.[2] Complete absence of sleep over long periods is impossible for humans to achieve (unless they suffer from fatal familial insomnia); brief microsleeps cannot be avoided.[3] Long-term total sleep deprivation has caused death in lab animals.[4]

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