Muscle RelaxationMuscle, SmoothMusclesMuscle ContractionMuscle Relaxants, CentralMuscle, Smooth, VascularRelaxation TherapyMuscle, SkeletalMuscle ProteinsTracheaNeuromuscular Nondepolarizing AgentsVasodilationNitric OxideMuscle Fibers, SkeletalCyclic GMPMuscle DevelopmentAcetylcholineMuscle FatigueNitroprussideNeuromuscular BlockadeVasodilator AgentsGuinea PigsMuscle TonusDeuteroporphyrinsAndrostanolsPenisElectric StimulationAtracuriumVecuronium BromideDose-Response Relationship, DrugNeuromuscular Blocking AgentsIsometric ContractionHSP20 Heat-Shock ProteinsRabbitsIsoproterenolEndothelium, VascularAorta, ThoracicSuccinylcholineRelaxationMuscle Fibers, Fast-TwitchNitroarginineCalciumMuscle DenervationElectromyographyMuscle Fibers, Slow-Twitchgamma-CyclodextrinsOxadiazolesBiological FactorsGuanylate CyclaseVasoactive Intestinal PeptideMyocytes, Smooth MuscleNitric Oxide DonorsCyclic GMP-Dependent Protein KinasesOpossumsMitochondria, MuscleAortaRats, Sprague-DawleyRats, WistarPenile ErectionNitric Oxide SynthaseNG-Nitroarginine Methyl EsterPancuroniumNeuromuscular JunctionAdrenergic beta-AgonistsNeck MusclesNitroglycerinOculomotor MusclesPapillary MusclesTime FactorsAnal CanalMuscle, StriatedBromcresol GreenVasoconstrictionEnzyme InhibitorsMuscle SpindlesGastric FundusDogsNorepinephrinePhenylephrineHistamineRespiratory MusclesNeostigminePurinonesArginineMuscle WeaknessQuinoxalinesCromakalimPhosphodiesterase InhibitorsMyocardial ContractionMethylene BlueMyotonia CongenitaAbdominal MusclesMuscle CellsCyclic AMPMembrane PotentialsPotassium ChlorideMesenteric ArteriesVasoconstrictor AgentsQuadriceps MuscleBiomechanical Phenomena