Dr. Isabelle Arnulf is a professor of neurology at Sorbonne University, Paris and director of the sleep disorders clinic and the National Reference Center for Rare Hypersomnias at Pitié-Salpêtrière university hospital, APHP-Sorbonne, Paris, France. Her research thematics are focused on neurological sleep disorder, including the mechanisms of idiopathic hypersomnia and Kleine-Levin syndrome, as well as abnormal behaviors during sleep (parasomnia). As a senior neurologist, she follows a cohort of 300 patients with Kleine-Levin syndrome. She authored 24 articles on Kleine-Levin syndrome.