hypnagogic hallucination
Pronunciation: hip-nah-GOG-ik hal-loo-sih-NAY-shun
Vivid sensory experiences that occur during the transition from wakefulness to sleep.
Full Definition
Hypnagogic hallucinations are vivid perceptual experiences that occur during the hypnagogic state, the transitional period between wakefulness and sleep onset. These phenomena can involve any sensory modality but most commonly include visual or auditory experiences such as seeing lights, shapes, or hearing voices or music. Unlike pathological hallucinations, hypnagogic hallucinations are relatively common in the general population and are considered a normal variant of sleep-related experiences. They are more frequent in individuals with narcolepsy, sleep deprivation, or certain medications. The corresponding experiences upon waking are called hypnopompic hallucinations. Proper recognition helps distinguish these benign phenomena from psychiatric symptoms requiring treatment.
Usage
Usage note: Distinguish from hypnopompic (upon waking) and pathological hallucinations.
In Context
- "The patient reported hypnagogic hallucinations involving musical melodies that occurred nightly." — sleep study report
- "Clinicians should distinguish hypnagogic hallucinations from symptoms of emerging psychosis." — diagnostic guidelines