Muscle RigidityNeuroleptic Malignant SyndromeMasseter MuscleSuccinylcholineMalignant HyperthermiaAlfentanilFentanylHalothaneMusclesFacial NerveFacial ParalysisFacial ExpressionFacial MusclesMuscle ProteinsMuscle, SmoothMuscle, SkeletalMuscle Fibers, SkeletalMuscle, Smooth, VascularFacial Nerve DiseasesFacial BonesMuscle Contraction