Localized loss of hypocretin (orexin) cells in narcolepsy without cataplexy.
Thannickal TC , Nienhuis R , Siegel JM
Narcolepsy with cataplexy is characterized by a loss of approximately 90% of hypocretin (Hcrt) neurons. However, more than a quarter of narcoleptics do not have cataplexy and have normal levels of hypocretin in their cerebrospinal fluid, raising the possibility that their disease is caused by unrelated abnormalities. In this study we examined hypocretin pathology in narcolepsy without cataplexy.
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