I’m devoted to the study of the neuronal network responsible for (REM) paradoxical sleep and its dysfunctions occurring in REM sleep behavior disorder and narcolepsy since 1983. I’m a specialist in REM sleep atonia, a subject relevant to cataplexy of narcoleptics, RBD and sleep apnea. I’m also actively trying to identify the function of paradoxical (REM) sleep. I’m currently using optogenetic and chemogenetic to resolve these questions.