title: Procerus sign in progressive supranuclear palsy.
authors.forename: Frederick E
authors.initials: FE
authors.lastname: Lepore
mesh_terms: D005149:Facial Expression; D005152:Facial Muscles / Q000503:physiopathology; D006801:Humans; D013494:Supranuclear Palsy, Progressive / Q000175:diagnosis / Q000503:physiopathology*