HCRT and narcolepsy: More than 80% of all patients with narcolepsy with atypical cataplexy, without cataplexy and those with other sleep or neurological disorders were found to have normal CSF orexin-A levels (>200 pg/ml) based on the RIA findings, which suggests that the majority of these patients’ orexinergic neurons remain intact1, 16, 35.