Abrupt loss of postural control after experiencing a strong emotion, without decreased consciousness. Often affects narcoleptics.
Example: A woman begins to laugh at a joke, then abruptly crumples to the floor. She’s alert and very embarrassed about this lapse.
Grinnell, R. (2016). Cataplexy. Psych Central. Retrieved on February 18, 2017, from https://psychcentral.com/encyclopedia/cataplexy/