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: 1  loss of muscle tone (cataplexy), 2  distorted perceptions (hypnagogic hallucinations), and. 3  inability to move or talk (sleep paralysis).