Can you develop Narcolepsy from a head injury?

Or even something similar to it? I am wondering because the past few days I've been tossing around a comic idea in my head for a character I created who has narcolepsy, and I was wondering if a severe head injury [like, say, getting hit by a car] could somehow cause it. Or if not specifically narcolepsy,... show more Or even something similar to it?
I am wondering because the past few days I've been tossing around a comic idea in my head for a character I created who has narcolepsy, and I was wondering if a severe head injury [like, say, getting hit by a car] could somehow cause it.
Or if not specifically narcolepsy, could it cause some other type of sleep disorder?
Any help/ideas are appreciated!
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