All people with narcolepsy experience excessive sleepiness during the day. Most (70%) also experience sudden but temporary muscle weakness called cataplexy.
In this video, Sarah films herself studying for an extended period of time where she has a sleep attack just 35 minutes in, and exhibits automated behaviour such as continuing to write--but actually just scribbling--while asleep.Narcolepsy
has a genetic component and tends to run in families. However, genetics are not the only factor involved in narcolepsy. Narcolepsy most likely involves a combination of genetics and one or more environmental triggers, such as infection, trauma, hormonal changes, immune system problems, or stress. It affects both men and women with symptoms usually beginning to appear between the ages 10 and 30.