title: Procerus sign in progressive supranuclear palsy.
authors.forename: S
authors.initials: S
authors.lastname: Romano
authors.forename: C
authors.initials: C
authors.lastname: Colosimo
mesh_terms: D005149:Facial Expression; D005152:Facial Muscles / Q000503:physiopathology; D019066:Facies; D006801:Humans; D013494:Supranuclear Palsy, Progressive / Q000175:diagnosis* / Q000503:physiopathology