Narcolepsy is a neurologic disorder characterized by frequent, involuntary, episodes of sleeping during the day. Sleep attacks may occur while driving, talking, or working.
Find answers in our in-depth report on narcolepsy:
Narcolepsy, according to its Greek roots, means a "sleep attack." But this little known and little understood disease is much more than longing for a nap after Thanksgiving dinner or nodding off during a boring lecture.