Narcolepsy
a neurological sleep disorder characterized primarily by excessive daytime sleepiness (EDS) associated with uncontrollable sleep urges, and these attacks of drowsiness persisting for only a few seconds or up to several minutes and such episodes varying in frequency from a few incidents to several during a single day, but also with common additional symptoms such as sudden extreme muscle weakness (cataplexy), a specific type of hallucination occuring just before falling asleep or upon awakening, and brief episodes of sleep paralysis while waking up
(Open, Moderated)