In 1880 by French physician Dr. Jean-Baptiste-Edouard Gélineau (1828-1906). In 1907, British neurologist Dr. William Gowers (1845-1915) in his book, The Border-Land of Epilepsy, differentiated narcolepsy as a unique disorder separate from other conditions that could cause excessive daytime sleepiness as epilepsy.
Narcolepsy is a rare sleep disorder which is characterized by by four main symptoms:
·Excessive Daytime Sleepiness (EDS),
·Cataplexy (episodes of sudden loss of muscle tone)
·Sleep paralysis (inability to move or speak while waking up)
·Hypnogogic hallucinations, or vivid dreams that occur while a person falls asleep