Facial MusclesFacial ParalysisFacial NerveSmilingFacial ExpressionZygomaNerve TransferFacial AsymmetryBone and BonesMasticatory MusclesSkull Base NeoplasmsMusclesElectromyographyParotid NeoplasmsBone RemodelingMuscle ProteinsMuscle, SmoothMuscle, SkeletalBone DensityFacial BonesMuscle Fibers, SkeletalMuscle, Smooth, VascularFacial Nerve DiseasesBone ResorptionMuscle DevelopmentFacial InjuriesMuscle Contraction