It's harder to count and think clearly right after waking from a good night's sleep than after staying up all night, according to a US study.
The study by the University of Colorado at Boulder shows that people who wake up after eight hours of sound sleep have more trouble thinking than after being deprived of sleep for more than 24 hours.
People who were tested had diminished short-term memory, counting skills and cognitive abilities during the groggy period after waking up known as sleep inertia, said CU-Boulder professor Kenneth Wright, the study's lead author.
"For a short period, at least, the effects of sleep inertia may be as bad as or worse than being legally drunk," Wright said, noting that cognitive deficiencies after 24 hours of sleeplessness have been shown to be comparable to the effects of drunkenness. More
The study by the University of Colorado at Boulder shows that people who wake up after eight hours of sound sleep have more trouble thinking than after being deprived of sleep for more than 24 hours.
People who were tested had diminished short-term memory, counting skills and cognitive abilities during the groggy period after waking up known as sleep inertia, said CU-Boulder professor Kenneth Wright, the study's lead author.
"For a short period, at least, the effects of sleep inertia may be as bad as or worse than being legally drunk," Wright said, noting that cognitive deficiencies after 24 hours of sleeplessness have been shown to be comparable to the effects of drunkenness. More
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