Muscle RelaxationSpasmSpasms, InfantileMuscle, SmoothMusclesHemifacial SpasmMuscle ContractionRelaxation TherapyMuscle, Smooth, VascularMuscle, SkeletalMuscle ProteinsCoronary VasospasmMuscle Fibers, SkeletalEsophageal Spasm, DiffuseNitric OxideVasodilationMuscle DevelopmentMuscle FatigueTracheaAcetylcholineCyclic GMPDeuteroporphyrinsFacial MusclesVasodilator AgentsHSP20 Heat-Shock ProteinsNeuromuscular BlockadeNitroprussideElectric StimulationNeuromuscular Nondepolarizing AgentsErgonovineRelaxationMuscle Fibers, Fast-TwitchMuscle TonusIsometric ContractionMuscle DenervationPenisElectromyographyCalciumDose-Response Relationship, DrugMuscle Fibers, Slow-TwitchRabbitsGuinea PigsEndothelium, VascularMyocytes, Smooth MuscleAngina Pectoris, VariantOpossumsMitochondria, MuscleTime FactorsNeck MusclesNitroglycerinNitroarginineOculomotor MusclesAorta, ThoracicMuscle Relaxants, CentralCyclic GMP-Dependent Protein KinasesNitric Oxide DonorsBiological FactorsIsoproterenolOxadiazolesRats, Sprague-DawleyGuanylate CyclasePapillary MusclesAnal CanalMuscle, StriatedBromcresol Greengamma-CyclodextrinsAndrostanolsNitric Oxide SynthaseVasoactive Intestinal PeptidePenile ErectionMuscle SpindlesAortaRespiratory MusclesRats, WistarMuscle WeaknessVasoconstrictionAtracuriumNG-Nitroarginine Methyl EsterEnzyme InhibitorsNeuromuscular JunctionDogsMyotonia CongenitaAbdominal MusclesMuscle CellsMasticatory MusclesMyocardial ContractionBiomechanical PhenomenaAdrenergic beta-AgonistsPhenylephrineQuadriceps MuscleVecuronium BromideMasseter MuscleParvalbuminsMyosin-Light-Chain PhosphataseArginineMembrane PotentialsNucleotides, CyclicNorepinephrinePurinonesQuinoxalines