MusclesFacial NerveFacial ParalysisFacial MusclesFacial ExpressionMuscle ProteinsMuscle, SmoothMuscle, SkeletalMuscle Fibers, SkeletalMuscle, Smooth, VascularFacial Nerve DiseasesFacial BonesMuscle DevelopmentFacial InjuriesMuscle ContractionFaceFacial AsymmetryFacial DermatosesMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationMuscle Fibers, Slow-TwitchMyocytes, Smooth MuscleMitochondria, MuscleFacial NeoplasmsFacial PainOculomotor MusclesNeck MusclesMuscle, StriatedMuscle SpindlesMuscle RelaxationMuscle WeaknessRespiratory MusclesPapillary MusclesMasseter MuscleMasticatory MusclesAbdominal MusclesQuadriceps MuscleMuscle CellsElectromyographyIntercostal MusclesMuscular AtrophyIsometric ContractionSatellite Cells, Skeletal MusclePectoralis MusclesTemporal MuscleFacial TransplantationMuscular DiseasesBeautyMotor NeuronsPsoas MusclesFacial NeuralgiaElectric StimulationMyofibrilsRabbitsHindlimbTime FactorsCells, CulturedEmotionsFaciesMaxillofacial DevelopmentCalciumMyosin Heavy ChainsPharyngeal MusclesBiomechanical PhenomenaDiaphragmFacial HemiatrophyCephalometryNeuromuscular JunctionGlycogenRats, Sprague-DawleyRNA, MessengerMuscular Dystrophy, AnimalMyoblastsMuscle CrampRats, WistarActinsBell PalsyLipRegenerationMice, Inbred mdxSarcomeresMyostatinMyoD ProteinVertical DimensionLegPhysical ExertionMuscle Stretching ExercisesMyocardiumMandibleAgingSignal TransductionMuscle RigidityExerciseHypertrophyAbnormalities, MultipleMovementMice, Inbred C57BLEstheticsCats