Narcolepsy is a chronic sleep disorder characterized by overwhelming daytime drowsiness and sudden attacks of sleep. People with narcolepsy often find it difficult to stay awake for long periods of time, regardless of the circumstances. This condition can significantly affect daily activities. Narcolepsy typically involves a sudden loss of muscle tone triggered by strong emotions, as well as sleep paralysis and hallucinations. It is believed to be caused by a lack of hypocretin, a neurotransmitter that controls wakefulness and REM sleep. Treatment usually involves medication and lifestyle changes to manage symptoms.

英語での「narcolepsy」の定義と意味

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