Muscle RelaxationMusclesMuscle, SmoothMuscle, Smooth, VascularMuscle ContractionMuscle, SkeletalMuscle ProteinsMuscle Fibers, SkeletalRelaxation TherapyMuscle DevelopmentMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationMuscle Fibers, Slow-TwitchMyocytes, Smooth MuscleMitochondria, MuscleNitric OxideVasodilationTracheaNeck MusclesOculomotor MusclesIsometric ContractionMuscle, StriatedPapillary MusclesMuscle SpindlesElectromyographyElectric StimulationRespiratory MusclesCyclic GMPMuscle WeaknessAcetylcholineRabbitsDeuteroporphyrinsCalciumAbdominal MusclesMuscle CellsQuadriceps MuscleHSP20 Heat-Shock ProteinsNeuromuscular BlockadeNitroprussideMasseter MuscleNeuromuscular Nondepolarizing AgentsGuinea PigsVasodilator AgentsFacial MusclesMasticatory MusclesPenisDose-Response Relationship, DrugIntercostal MusclesRelaxationTime FactorsEndothelium, VascularMuscular AtrophyRats, Sprague-DawleyMuscle TonusSatellite Cells, Skeletal MuscleNeuromuscular JunctionAorta, ThoracicRats, WistarAortaOpossumsBiomechanical PhenomenaPectoralis MusclesIsoproterenolMuscle Relaxants, CentralNitroarginineCyclic GMP-Dependent Protein KinasesNitric Oxide DonorsMuscular DiseasesOxadiazolesBiological FactorsMyofibrilsAnal CanalGuanylate CyclasePsoas MusclesNitric Oxide SynthaseVasoactive Intestinal PeptideAndrostanolsDogsEnzyme InhibitorsPenile ErectionMembrane PotentialsHindlimbgamma-CyclodextrinsBromcresol GreenCells, CulturedTemporal MuscleNG-Nitroarginine Methyl EsterMyocardial ContractionRNA, MessengerAtracuriumMyosin Heavy ChainsNitroglycerinMyotonia CongenitaKineticsVasoconstrictionDiaphragmPhenylephrineCatsAdrenergic beta-Agonists