Clinical and polygraphic hallmarks of type 1 narcolepsy (NT1) are the occurrence of episodes of rapid eye movement (REM) sleep at the onset of nocturnal or daytime sleep (SOREMP) and dissociated wake–REM sleep manifestations (cataplexy, sleep paralysis, hallucinations) [1]. Some recent neurophysiological findings, demonstrating that SOREMP in NT1 lacks the typical sympathetic activation of REM...