Narcolepsy may be caused by

Question

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Narcolepsy is a sleep disorder characterized by excessive daytime sleepiness, cataplexy, sleep paralysis, and vivid dreams. It is believed to be caused by a lack of production or sensitivity to the chemical hypocretin, also known as orexin. Hypocretin is produced in the hypothalamus and promotes wakefulness, so a deficiency in this chemical can lead to uncontrollable sleep attacks during the day. B, C, and A are not known to cause narcolepsy. Brain abnormalities in the medulla are associated with sleep apnea, not narcolepsy.

Narcolepsy May Be Caused by