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Then, after 15 minutes, the brain's anterior cortical regions receive normal daytime blood flow. This 15 minute time period corresponds to the sleep inertia period. [citation needed] Studies show that drinking alcoholic beverages in the evening causes physiological distress upon wake up. This phenomenon is known colloquially as a hangover. [10 ...
As a consequence, it causes a jerk to wake the sleeper up so they can catch themselves. [11] A researcher at the University of Colorado suggested that a hypnic jerk could be "an archaic reflex to the brain's misinterpretation of muscle relaxation with the onset of sleep as a signal that a sleeping primate is falling out of a tree.
Stretching often occurs instinctively after waking from sleep, after long periods of inactivity, or after exiting confined spaces and areas. In addition to vertebrates (e.g. mammals and birds), spiders have also been found to exhibit stretching. [4] [5]
For example, if you always wake up because the sun peeks in at 5 a.m., hang up blackout curtains. Or, if you wake up feeling warm, set your thermostat a few degrees cooler the next night. Consider ...
Two new studies suggest once again the importance of getting a good night's sleep for good health over a ... "It's like turning on the dishwasher before you go to bed and waking up with a clean ...
Sleeping in a closed room with an electric fan running does not result in "fan death", as is widely believed in South Korea among older people. [269] [270] As of 2019 this belief was in decline. [271] Nocturia (waking up at night to urinate) is equally prevalent in women and men, [272] although it is more common among both men and women over 50 ...
In one study of men aged 65 years and over, those with lower testosterone levels experienced reduced sleep efficiency, woke up more in the middle of the night, and had less time in slow-wave sleep ...
Sleep research conducted in the 1990s showed that such waking up during the night may be a natural sleep pattern, rather than a form of insomnia. [2] If interrupted sleep (called "biphasic sleeping" or " bimodal sleep ") is perceived as normal and not referred to as "insomnia", less distress is caused and a return to sleep usually occurs after ...