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Techniques for extending hypnagogia range from informal (e.g. the subject holds up one of their arms as they go to sleep, to be awakened when it falls), [48] to the use of biofeedback devices to induce a "theta" state – produced naturally the most when we are dreaming – characterized by relaxation and theta EEG activity.
The idea of the witching hour may stem from the human sleep cycle and circadian rhythm – the body is going through REM sleep at that time, where the heart rate is slower, body temperature reduced, breathing pattern and blood pressure irregular. [5] Sudden awakening from REM sleep could cause agitation, fear and disorientation in an individual ...
Sleeping and waking up at different times is associated with an increased risk of heart attack and stroke, even for people who get the recommended amount of sleep, according to new research.
Palpitations are perceived abnormalities of the heartbeat characterized by awareness of cardiac muscle contractions in the chest, which is further characterized by the hard, fast and/or irregular beatings of the heart. [1] Symptoms include a rapid pulsation, an abnormally rapid or irregular beating of the heart. [1]
Conversely, more sleep regularity was protective against heart attack and stroke. A new study found an increased risk of cardiovascular events in people with irregular sleep patterns, even when ...
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 ...