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  2. Hypnopompia - Wikipedia

    en.wikipedia.org/wiki/Hypnopompia

    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.

  3. Hypnagogia - Wikipedia

    en.wikipedia.org/wiki/Hypnagogia

    Hypnagogic hallucinations are often auditory or have an auditory component. Like the visuals, hypnagogic sounds vary in intensity from faint impressions to loud noises, like knocking and crashes and bangs (exploding head syndrome). People may imagine their own name called, crumpling bags, white noise, or a doorbell ringing.

  4. Sleep-related hallucination - Wikipedia

    en.wikipedia.org/wiki/Sleep-related_hallucination

    Sleep-related hallucination may refer to: Hypnagogic hallucinationhallucinations while falling asleep; Dreaming – conscious experiences during sleep; Hypnopompic hallucinationhallucinations while waking up

  5. Hallucination - Wikipedia

    en.wikipedia.org/wiki/Hallucination

    A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [6] They are distinguishable from several related phenomena, such as dreaming (), which does not involve wakefulness; pseudohallucination, which does not mimic real perception, and is accurately perceived as unreal; illusion, which involves distorted or misinterpreted real ...

  6. Sleep paralysis - Wikipedia

    en.wikipedia.org/wiki/Sleep_paralysis

    One common hallucination is the presence of an incubus. A neurological hypothesis is that in sleep paralysis the cerebellum , which usually coordinates body movement and provides information on body position, experiences a brief myoclonic spike in brain activity inducing a floating sensation.

  7. Hallucinogen persisting perception disorder - Wikipedia

    en.wikipedia.org/wiki/Hallucinogen_persisting...

    Typical symptoms of the disorder include halos or auras surrounding objects, trails following objects in motion, difficulty distinguishing between colors, apparent shifts in the hue of a given item, the illusion of movement in a static setting, visual snow, distortions in the dimensions of a perceived object, intensified hypnagogic and hypnopompic hallucinations, monocular double vision ...

  8. Narcolepsy - Wikipedia

    en.wikipedia.org/wiki/Narcolepsy

    Narcolepsy type 2 (NT2) does not have features of cataplexy and CSF orexin levels are normal. Sleep-related hallucinations, also known as hypnogogic (going to sleep) and hypnopompic (on awakening) are vivid hallucinations that can be auditory, visual, or tactile and may occur independent of or in combination with an inability to move (sleep ...

  9. Sleep deprivation - Wikipedia

    en.wikipedia.org/wiki/Sleep_deprivation

    hypnagogic and hypnopompic hallucinations during falling asleep and waking, which are entirely normal [101] hand tremor [102] headaches; malaise; stye; periorbital puffiness, commonly known as "bags under eyes" or eye bags; increased blood pressure [103] increased stress hormone levels [103] increased risk of type 2 diabetes [103]

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