Muscle RelaxationNeuromuscular JunctionMusclesMuscle, SmoothHeartMuscle ContractionMuscle, SkeletalMuscle ProteinsMuscle, Smooth, VascularMuscle Fibers, SkeletalMuscle DevelopmentRelaxation TherapyMyocardiumHeart RatePapillary MusclesMuscle FatigueSciatic NerveMuscle Fibers, Fast-TwitchMuscle DenervationElectric StimulationMitochondria, MuscleMuscle Fibers, Slow-TwitchMyocardial ContractionMyocytes, Smooth MuscleRabbitsNitric OxideCalciumVasodilationPeripheral NervesTracheaNeck MusclesOculomotor MusclesIsometric ContractionElectromyographyGuinea PigsMuscle, StriatedMuscle SpindlesAcetylcholineRats, Sprague-DawleyNerve FibersRespiratory MusclesCyclic GMPTime FactorsMyofibrilsMuscle WeaknessHeart FailureOptic NerveDose-Response Relationship, DrugRats, WistarDeuteroporphyrinsMuscle CellsAbdominal MusclesNitroprussideIsoproterenolDogsVasodilator AgentsQuadriceps MuscleHSP20 Heat-Shock ProteinsNeuromuscular BlockadeNerve RegenerationMasseter MuscleNeuromuscular Nondepolarizing AgentsPenisFacial MusclesCatsMembrane PotentialsHeart DiseasesMasticatory MusclesEndothelium, VascularRelaxationCells, CulturedIntercostal MusclesMuscular AtrophyRNA, MessengerKineticsMuscle TonusAortaNerve EndingsSatellite Cells, Skeletal MuscleBiomechanical PhenomenaAorta, ThoracicNerve BlockMyocytes, CardiacNitroarginineOpossumsTibial NervePectoralis MusclesNitric Oxide DonorsAdenosine TriphosphateMuscle Relaxants, CentralMuscular DiseasesMedian NerveSural NerveCyclic GMP-Dependent Protein KinasesAction PotentialsFacial NerveNitric Oxide SynthaseNerve CrushOxadiazolesVasoactive Intestinal Peptide