An Introduction to Narcolepsy Symptoms
Narcolepsy is a chronic condition caused by the brain's inability to regulate sleep-wake cycles normally. At various times throughout the day,
people with narcolepsy experience the fleeting urge to sleep. If the urge becomes overwhelming, patients fall asleep for periods lasting from a few seconds to several minutes. In rare cases, some people may remain asleep for an hour or longer.
The classic narcolepsy symptom is excessive and overwhelming daytime sleepiness. Three other classic narcolepsy symptoms, which may not occur in all patients, are:
- Cataplexy
- Sleep paralysis
- Hypnagogic hallucinations.
Excessive Daytime Sleepiness
The characteristic narcolepsy symptom is excessive and overwhelming daytime sleepiness, even after adequate nighttime sleep. A person with narcolepsy is likely to become drowsy or to fall asleep, often at inappropriate times and places. Daytime sleep attacks may occur with or without warning and may be irresistible. These attacks can occur repeatedly in a single day. Drowsiness may persist for prolonged periods of time. In addition, nighttime sleep may be fragmented with frequent interruptions.
Cataplexy
Cataplexy is another symptom of narcolepsy. Cataplexy is a sudden episode of loss of muscle function, ranging from slight weakness (such as limpness at the neck or knees, sagging facial muscles, or inability to speak clearly) to complete body collapse. Attacks may be triggered by sudden emotional reactions such as laughter, anger, or fear and may last from a few seconds to several minutes. The person remains conscious throughout the episode.
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