Narcolepsy (cont.)

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What is narcolepsy?

Narcolepsy is a chronic disease of the central nervous system. Excessive daytime sleepiness (EDS) is the main symptom and is present in 100% of patients with narcolepsy. Other primary symptoms of narcolepsy include:

  • loss of muscle tone (cataplexy),
  • distorted perceptions (hypnagogic hallucinations), and
  • inability to move or talk (sleep paralysis).

Additional symptoms include disturbed nocturnal sleep and automatic behavior (patients carry out certain actions without conscious awareness). All of the symptoms of narcolepsy may be present in various combinations and degrees of severity.

Narcolepsy usually begins in teenagers or young adults and affects both sexes equally. The first symptom to appear is excessive daytime sleepiness, which may remain unrecognized for a long time in that it develops gradually over time. The other symptoms can follow excessive daytime sleepiness by months or years.

How common is narcolepsy?

The prevalence of narcolepsy is similar to that of Parkinson's disease and multiple sclerosis. In the United States, the National Institute of Neurological Disorders and Stroke estimates narcolepsy affects one in every 3,000 people.

Narcolepsy often remains undiagnosed or misdiagnosed for several years. This may occur because physicians do not consider the diagnosis of narcolepsy frequently enough. They may think of narcolepsy only in people who have the main symptom of excessive daytime sleepiness. Narcolepsy may not be considered in the evaluation of patients who come to doctors complaining of fatigue, tiredness, or problems with concentration, attention, memory, and performance, and other illnesses (seizures, mental illness, etc.)

Medically Reviewed by a Doctor on 2/6/2014

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Narcolepsy - Treatments Question: What was the treatment for you narcolepsy?
Narcolepsy - Experience Question: Share your experience with narcolepsy.
Narcolepsy - Excessive Daytime Sleepiness Question: If you've been diagnosed with narcolepsy, please discuss your experience with daytime sleepiness.
Narcolepsy - Hypnagogic Hallucinations Question: Describe what a hypnagogic hallucination is like for you, a friend, or relative.
Narcolepsy - Muscle Control Question: Relate your observations of cataplexy (loss of muscle control) in a friend or relative.

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