title: Invited commentary.
authors.affiliation: Department of Plastic and Hand Surgery, University of Freiburg Medical Centre, Hugstetter Str. 55, 79106 Freiburg, Germany. steffen.eisenhardt@uniklinik-freiburg.de
authors.forename: S U
authors.initials: SU
authors.lastname: Eisenhardt
authors.forename: H
authors.initials: H
authors.lastname: Bannasch
mesh_terms: D005158:Facial Paralysis / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008406:Masseter Muscle / Q000502:physiology*; D009119:Muscle Contraction / Q000502:physiology*; D012904:Smiling / Q000502:physiology*