Hypnogogic hallucination

Hypnogogic hallucination

A hallucination, such as the sensation of falling, that occurs at the onset of sleep.
Mentioned in: Hallucinations
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
No, you're experiencing a hypnogogic hallucination. These are perfectly normal when you are drifting into the lightest part or alpha phase of sleep.
Cocteau, devastated by the death of his lover and protege, the twenty-year-old poet Raymond Radiguet, was high on opium and in a state of hypnogogic hallucination, which he described as "a sleep that seemed interminable but turned out to have lasted half a second." In this moment between waking and sleeping Cocteau heard a voice calling to him, saying, "My name is on the plate!" Jolted awake, he was faced with the brass door-plate of the elevator company.
They are excessive daytime sleepiness, cataplexy (sudden loss of muscle tone, usually in relation to strong emotions), hypnogogic hallucinations (seeing things that aren't real, particularly upon going to sleep or waking up), and sleep paralysis.