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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.
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.
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 ...
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.
Command auditory hallucinations (also known as imperative hallucinations) were common and experienced by more than half of the group in a study at Bellevue Hospital Center's Children's Psychiatric Inpatient Unit. [11] In this study, delusions were characterized as persecutory for the most part, but some children reported delusions of control. [11]
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]
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.
Sleep-related hallucination may refer to: Hypnagogic hallucination – hallucinations while falling asleep; Dreaming – conscious experiences during sleep;