Muscle RelaxationMuscle, SmoothMusclesMuscle ContractionRelaxation TherapyMuscle, Smooth, VascularMuscle, SkeletalMuscle ProteinsMuscle Fibers, SkeletalNitric OxideVasodilationMuscle DevelopmentMuscle FatigueTracheaCyclic GMPDeuteroporphyrinsAcetylcholineHSP20 Heat-Shock ProteinsNeuromuscular BlockadeNitroprussideNeuromuscular Nondepolarizing AgentsElectric StimulationRelaxationMuscle Fibers, Fast-TwitchVasodilator AgentsIsometric ContractionMuscle DenervationPenisMuscle Fibers, Slow-TwitchMuscle TonusRabbitsGuinea PigsCalciumEndothelium, VascularElectromyographyMyocytes, Smooth MuscleDose-Response Relationship, DrugOpossumsMitochondria, MuscleNitroarginineAorta, ThoracicCyclic GMP-Dependent Protein KinasesNitric Oxide DonorsBiological FactorsIsoproterenolOxadiazolesNeck MusclesGuanylate CyclaseOculomotor MusclesPapillary MusclesAnal CanalMuscle, StriatedBromcresol Greengamma-CyclodextrinsAndrostanolsVasoactive Intestinal PeptidePenile ErectionMuscle SpindlesRats, Sprague-DawleyNitric Oxide SynthaseAortaRespiratory MusclesTime FactorsMuscle Relaxants, CentralMuscle WeaknessRats, WistarAtracuriumNG-Nitroarginine Methyl EsterNitroglycerinNeuromuscular JunctionEnzyme InhibitorsMyotonia CongenitaAbdominal MusclesMuscle CellsMyocardial ContractionDogsPhenylephrineQuadriceps MuscleBiomechanical PhenomenaVecuronium BromideMasseter MuscleParvalbuminsAdrenergic beta-AgonistsMyosin-Light-Chain PhosphataseNucleotides, CyclicVasoconstrictionFacial MusclesMembrane PotentialsPurinonesArginineQuinoxalinesNeostigmineMasticatory MusclesIntercostal MusclesPhosphodiesterase InhibitorsNorepinephrineBiofeedback, PsychologySuccinylcholineMeditationMuscular Atrophy