title: Procerus sign in progressive supranuclear palsy.
authors.forename: Shyam S
authors.initials: SS
authors.lastname: Moudgil
mesh_terms: D005149:Facial Expression; D005152:Facial Muscles / Q000033:anatomy & histology / Q000503:physiopathology; D006801:Humans; D013494:Supranuclear Palsy, Progressive / Q000175:diagnosis / Q000503:physiopathology*