hypnagogic image

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Related to Hypnagogic hallucination: narcolepsy, hypnopompic hallucination

hypnagogic image

n
(Psychology) psychol an image experienced by a person just before falling asleep, which often resembles a hallucination
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Even in a non-narcoleptic person, REM sleep deprivation can result in phenomena such as hallucinating while awake (i.e., hypnagogic hallucination).
Apparently it's called a hypnagogic hallucination (if it happens as you're going to sleep) and a hypnopompic hallucination if Sleep's a funny old it happens as you're waking.
[2] About 10% of individuals with narcolepsy have the four core symptoms of narcolepsy: paroxysmal sleep, cataplexy, hypnagogic hallucination, and sleep paralysis.
Also, she reported visual distortions in the absence of drowsiness,4 thereby ruling out hypnagogic hallucination.5
Narcolepsy is a rare, chronic nervous system disease that usually includes acute daytime drowsiness, episodic cataplexy, sleep paralysis, hypnagogic hallucination and a disrupted sleep cycle.
A hypnagogic hallucination is vivid imagery that occurs with the onset of sleep that is hard to distinguish from reality.
* Hypnagogic Hallucination (20-40%) Dream imagery occurring at the onset or end of sleep,
Narcolepsy is a prolonged neurological disorder related to excessive daytime sleepiness (EDS), cataplexy, hypnagogic hallucinations, sleep paralysis, and fragmented night sleep.
Although not unique to narcolepsy, common findings include hypnagogic hallucinations and sleep paralysis.
(And of course, like a bad trip, the night can be full of terror: hypnagogic hallucinations causing mysterious shadows to sway before your open eyes or inducing furniture to hulk and loom.)