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These myoclonic twitches, jerks, or seizures are usually caused by sudden muscle contractions (positive myoclonus) or brief lapses of contraction (negative myoclonus). The most common circumstance under which they occur is while falling asleep (hypnic jerk). Myoclonic jerks occur in healthy people and are experienced occasionally by everyone.
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.
Winter brings less daylight and colder temperatures, which can disrupt sleep. ... while as many as 10% to 20% may have a mild case of SAD. The condition is four times more common in women than men ...
The word hypnagogia is sometimes used in a restricted sense to refer to the onset of sleep, and contrasted with hypnopompia, Frederic Myers's term for waking up. [2] However, hypnagogia is also regularly employed in a more general sense that covers both falling asleep and waking up.
Seeing the Light to Enjoy Winter. While winter may not be the season for long, sun-soaked days, it's possible to find balance and embrace what the season offers without letting it negatively ...
Specifically, it could be inflammation in the cornea or certain glands, membranes or substances that make up tears. Inflammation in these spots can cause cells to die or damage tissues or nerves ...
Various measures can be used to improve the return of blood to the heart; the wearing of compression stockings and exercises ("physical counterpressure maneuvers" or PCMs) can be undertaken just before standing up (e.g., leg crossing and squatting), as muscular contraction helps return blood from the legs to the upper body.
If you're traveling for the holidays, you're probably feeling a bit worn-down—but is it just fatigue, or could it be COVID-19?. It’s probably been a minute since you last thought about COVID ...