sleep inertia


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sleep inertia

The time it takes to become fully alert after waking; it is most marked in the first 10-15 minutes after awakening, but can last hours, and is worse with chronic sleep deprivation and circadian misalignment.

sleep inertia

The normal impairment in thinking and motor performance that immediately follows awakening.
See also: inertia
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Many studies, includingonein 2001 led by researchers from the University of Pennsylvania and Harvard Medical School, have found that caffeine helps with sleep inertia, making us feel more alert more quickly than we would without it.
The study results showing that both hypnotic sleep medications and sleep inertia cause significant impairment have important public health implications, said Wright.
Sleep inertia is the reason only one pilot was able to sleep at a time, and both pilots had to be awake together for a minimum of 15 minutes before the other could start their napping.
Sleep inertia refers to a period of disorientation and performance decrement that may occur immediately upon waking from a nap.
People woken while in slowwave sleep feel groggy, a phenomenon known as sleep inertia, which can take up to half an hour to shake off.
The object is to minimize sleep inertia, that temporary grogginess you feel when you wake up from a deep sleep.
It is clear from this figure that the variables loading on factor 1 all showed an initial rise, reflecting a sleep inertia or 'wake-up' effect, and a rather smaller final fall reflecting a 'sleep anticipation' effect.
One can feel groggy for five to 15 minutes after waking, which is known as sleep inertia.
Sleep inertia is that groggy and slightly disorienting feeling that some nappers experience when awakening from a nap.
A clock that allows you to wake up gradually may ease those first few moments of sleep inertia, which are the worst.
It also appears to be based on a publication in which the duration of sleep inertia was estimated to be up to 4 hours, an overestimation based on the known improvement in performance, even in totally sleep-deprived individuals, that occurs across the day as a result of the circadian alertness signal.