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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. Hypnic jerks are one form of involuntary muscle twitches ...
Hypnagogia. Hypnagogia is the transitional state from wakefulness to sleep, also defined as the waning state of consciousness during the onset of sleep. Its opposite state is described as hypnopompia – the transitional state from sleep into wakefulness. Mental phenomena that may occur during this "threshold consciousness" phase include ...
Psychiatry. Frequency. c. 4% [1] Nightmare disorder is a sleep disorder characterized by repeated intense nightmares that most often center on threats to physical safety and security. [2] The nightmares usually occur during the REM stage of sleep, and the person who experiences the nightmares typically remembers them well upon waking. [2]
In Latvian folk culture sleep paralysis is called a torture or strangling by Lietuvēns. It is thought to be a soul of a killed (strangled, drowned, hanged) person and attacks both people and domestic animals. When under attack, one must move the toe of the left foot to get rid of the attacker. [20]
v. t. e. Mediumship is the pseudoscientific [1] practice of purportedly mediating communication between familiar spirits or spirits of the dead and living human beings. Practitioners are known as "mediums" or "spirit mediums". [2][3] There are different types of mediumship or spirit channelling, including séance tables, trance, and ouija.
Social and cultural anthropology. v. t. e. Spirit possession is an unusual or an altered state of consciousness and associated behaviors which are purportedly caused by the control of a human body and its functions by spirits, ghosts, demons, angels, or gods. [1]
Epileptic seizure, nightmares. Night terror, also called sleep terror, is a sleep disorder causing feelings of panic or dread and typically occurring during the first hours of stage 3–4 non-rapid eye movement (NREM) sleep [1] and lasting for 1 to 10 minutes. [2] It can last longer, especially in children. [2]
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