The Sleep Disorder Canine Narcolepsy is Caused by a
Mutation in the Hypocretin (Orexin) Receptor 2 Gene.
L. Lin et al., Cell 98 365 1999
Narcolepsy in orexin Knockout Mice:
Molecular Genetics of Sleep
Regulation.
RM Chemelli et al., Cell 98, 437 1999
Narcolepsy: debilitating,
neurological disorder
characterized by:
1. Sleep attacks
2. Episodic loss of muscle tone
(cataplexy)
3. Hypnogogic hallucinations
4. Abnormal sleep-wake cycle