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A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
Naturally, amnesia contributes to the difficulty of studying hypnagogia, as does the typically fleeting nature of hypnagogic experiences. These problems have been tackled by experimenters in several ways, including voluntary or induced interruptions, [11] sleep manipulation, [48] the use of techniques to "hover on the edge of sleep" thereby ...
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.
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Hypnic jerk, also called hypnagogic jerk, is a normal reaction that can be caused by anxiety, caffeine, a dream, or discomfort of sleeping. A hypnic jerk is the feeling triggered by a sudden muscle twitch, causing the feeling of falling while sleeping or dreaming. Hypnic jerks typically occur moments before the first stage of sleep. [2] About ...
Hypnopompia (also known as hypnopompic state) is the state of consciousness leading out of sleep, a term coined by the psychical researcher Frederic Myers.Its mirror is the hypnagogic state at sleep onset; though often conflated, the two states are not identical and have a different phenomenological character.
1. Fatigue. Research indicates that daytime sleepiness is the most obvious and common sign of sleep debt.If you feel groggy even after you’ve been awake for a while or if you find yourself ...