SpasmMuscle RelaxationMusclesMuscle SpasticityNeck MusclesMuscle, SkeletalMuscle, SmoothSpasms, InfantileMuscle ContractionCervical AtlasOccipital BoneMuscle, Smooth, VascularMuscle ProteinsNeuromuscular AgentsElectric StimulationElectromyographyLegMuscle Fibers, SkeletalSpinal Cord InjuriesHemifacial SpasmMotor NeuronsBotulinum Toxins, Type ARelaxation TherapyMuscle DevelopmentMuscle FatigueIsometric ContractionMuscle Fibers, Fast-TwitchMuscle DenervationCoronary VasospasmMuscle Fibers, Slow-TwitchTime FactorsMyocytes, Smooth MuscleFacial MusclesNitric OxideMitochondria, MuscleTracheaAcetylcholineVasodilationMuscular AtrophyIntermittent ClaudicationOculomotor MusclesCalciumEsophageal Spasm, DiffuseRabbitsHindlimbMuscle SpindlesPapillary MusclesMuscle, StriatedCyclic GMPPhosphocreatineCattleRespiratory MusclesDose-Response Relationship, DrugMuscle WeaknessGuinea PigsPeripheral Arterial DiseaseRats, Sprague-DawleyVasodilator AgentsDeuteroporphyrinsRats, WistarAbdominal MusclesReflex, StretchMuscle CellsCells, CulturedRegional Blood FlowQuadriceps MuscleNitroprussideNeuromuscular BlockadeElectric Stimulation TherapyHSP20 Heat-Shock ProteinsMasseter MuscleMasticatory MusclesBiomechanical PhenomenaNeuromuscular Nondepolarizing AgentsEndothelium, VascularPenisIsoproterenolMagnetic Resonance SpectroscopyAnkleAnkle Brachial IndexIntercostal MusclesMuscle TonusAchilles TendonNeuromuscular JunctionRelaxationErgonovinePeripheral Vascular DiseasesMuscle Relaxants, CentralStimulation, ChemicalCatsDogsAortaSignal TransductionEnzyme InhibitorsExerciseAorta, ThoracicSatellite Cells, Skeletal MuscleRNA, MessengerTorqueKinetics