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If you notice that you're waking up in the middle of the night, feeling exhausted in the middle of the day, or experiencing some other unpleasantness at the same time each day or night, consider ...
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.
Researchers studied 300 people with ‘advanced sleep phase’.
The most important thing to do when waking up in the middle of the night is to resist looking at the clock, Peters-Mathews said. “If the alarm is not going off, it’s not time to wake up. It ...
Waking up in the light: cortisol awakening response is larger when people wake up in light rather than darkness. [14] [15] Noise: there is no cortisol rise after nights with traffic-like low-frequency noise. [16] Alarm clock vs. spontaneous waking: there is no difference on days when people woke up spontaneously or used the alarm clock. [3]
A circadian rhythm is an entrainable, endogenous, biological activity that has a period of roughly twenty-four hours. This internal time-keeping mechanism is centralized in the suprachiasmatic nucleus (SCN) of humans, and allows for the internal physiological mechanisms underlying sleep and alertness to become synchronized to external environmental cues, like the light-dark cycle. [4]
After getting less than stellar sleep all damn week, tonight is finally your night. You have eight glorious hours to devote to slumber, and you can’t wait to snuggle under your organic cotton ...
Sleep inertia is a physiological state of impaired cognitive and sensory-motor performance that is present immediately after awakening. It persists during the transition of sleep to wakefulness, where an individual will experience feelings of drowsiness, disorientation and a decline in motor dexterity.