🧠 Yesterday’s #ClinicalChallenge was: What is the approximate prevalence of REM sleep behavior disorder in patients with progressive supranuclear palsy? A. 10% B. 25% C. 50% D. 75% 🎯The correct answer is:” B. In a retrospective study of 86 patients with clinically diagnosed progressive supranuclear palsy (PSP), the prevalence of rapid eye movement sleep behavior disorder (RBD) was 28 percent. RBD is a relatively uncommon disease feature of PSP, in contrast with Parkinson disease and other synu