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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.
Parasomnias are a category of sleep disorders that involve abnormal movements, behaviors, emotions, perceptions, and dreams that occur while falling asleep, sleeping, between sleep stages, or during arousal from sleep.
Those with RLS have a hard time describing them, using words or phrases such as uncomfortable, painful, 'antsy', electrical, creeping, itching, pins and needles, pulling, crawling, buzzing, and numbness. It is sometimes described similar to a limb 'falling asleep' or an exaggerated sense of positional awareness of the affected area.
Prior to Racine's research into epilepsy, a standardized scheme for the severity of a seizure was not known. [3] In 1972, Ronald J. Racine sought to develop a scheme that quantified the severity of a seizure. Using animal testing (rat kindling model), Racine was able to stimulate specific parts of the brain using slight electrical impulses.
According to one Centers for Disease Control and Prevention (CDC) study, among 74,571 adult respondents in 12 U.S. states, 35.3% reported <7 hours of sleep during a typical 24-hour period, 48.0% reported snoring, 37.9% reported unintentionally falling asleep during the day at least once in the preceding month, and 4.7% reported nodding off or ...
Obdormition (/ ˌ ɒ b d ɔːr ˈ m ɪ ʃ ən /; from Latin obdormire "to fall asleep") is a medical term describing temporary numbness in a limb, often caused by constant pressure on nerves or lack of movement. [1] This is colloquially referred to as the limb "going to sleep" and is usually followed by paresthesia, colloquially called "pins ...
Exploding head syndrome (EHS) is an abnormal sensory perception during sleep in which a person experiences auditory hallucinations that are loud and of short duration when falling asleep or waking up. [2] [4] The noise may be frightening, typically occurs only occasionally, and is not a serious health concern. [2]
Sleep paralysis is a state, during waking up or falling asleep, in which a person is conscious but in a complete state of full-body paralysis. [ 1 ] [ 2 ] During an episode, the person may hallucinate (hear, feel, or see things that are not there), which often results in fear .