What are hypnagogic hallucinations?
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Hypnagogic hallucinations are vivid hallucinations that occur during the transition between wakefulness and REM sleep. They can be visual, auditory, tactile, or kinetic and can be terrifying for the individual experiencing them . Hypnagogic hallucinations are a common symptom of narcolepsy, a disorder characterized by excessive sleepiness, cataplexy, and disturbed sleep . They are also associated with Parkinson's disease (PD), with hypnagogic hallucinations occurring more frequently as PD progresses and with longer duration of treatment with dopaminergic agents . The occurrence of hypnagogic hallucinations in PD is thought to be related to partial hypocretin cell loss and disturbed hypocretin signaling . Sleep-related hallucinations, including hypnagogic hallucinations, can occur in normal individuals but are more frequent in patients with various clinical conditions, especially narcolepsy . Evaluation of sleep-related hallucinations involves comprehensive clinical assessment, and management focuses on treating underlying causes .
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| Hypnagogic hallucinations are mentioned in the abstract of the paper, but no specific definition or explanation is provided. | |
| Hypnagogic hallucinations are hallucinations that occur while falling asleep and the person experiencing them typically knows they are not real. | |
| Hypnagogic hallucinations are vivid hallucinations that occur at sleep onset, during the transition between wakefulness and REM sleep. | |
| Hypnagogic hallucinations are perceptual experiences that occur at sleep onset, according to the provided paper. |
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