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Article: Narcolepsy
- Article from:
- Gale Encyclopedia of Mental Disorders
- Author:
CopyrightCOPYRIGHT 2003 The Gale Group Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Narcolepsy
Definition
Narcolepsy is a disorder marked by excessive daytime sleepiness, uncontrollable sleep attacks, and cataplexy (a sudden loss of muscle tone, usually lasting up to half an hour).
Description
Narcolepsy is the second-leading cause of excessive daytime sleepiness (after obstructive sleep apnea). Persistent sleepiness and sleep attacks are the hallmarks of this condition. The sleepiness has been compared to the feeling of trying to stay awake after not sleeping for two or three days.
People with narcolepsy fall asleep suddenly
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anywhere, at any time, even in the middle of a conversation. These sleep attacks can last from a few seconds to more than an hour. ...