Muscle Fibers, Fast-TwitchMusclesMuscle ContractionMuscle Fibers, Slow-TwitchArsenazo IIISnakesRana temporariaHeptaminolMuscle Fibers, SkeletalMuscle, SkeletalAnuraMuscle DenervationRana pipiensHypertonic SolutionsCalciumSarcoplasmic ReticulumMuscle ProteinsMembrane PotentialsCalcium-Transporting ATPasesRabbitsMyofibrilsNeuromuscular JunctionMuscle DevelopmentMuscle, SmoothElectric StimulationMotor NeuronsNerve FibersMotor EndplateIsometric ContractionMuscle, Smooth, VascularTime FactorsNeural ConductionAction PotentialsMuscle FatigueCatsMyosin Heavy ChainsDiaphragmMitochondria, MuscleSarcomeresMuscle SpindlesTetrodotoxinPsoas MusclesDietary FiberOculomotor MusclesMuscle RelaxationElectromyographyMuscular AtrophyElectrophysiologyMuscular DiseasesPotassiumPapillary MusclesMuscle, StriatedMuscle WeaknessHindlimbThoracicaQuadriceps MuscleRespiratory MusclesMasseter MuscleNeck MusclesMuscular Dystrophy, AnimalMyocytes, Smooth MuscleMyosinsBiomechanical PhenomenaSatellite Cells, Skeletal MuscleMasticatory MusclesAbdominal MusclesMineral FibersCaffeineIntercostal MusclesHistocytochemistryMice, Inbred mdxSarcolemmaRanidaeMuscle CellsRana esculentaFacial MusclesKineticsRats, WistarTubocurarineMicroscopy, ElectronCotton FiberPectoralis MusclesPurkinje FibersModels, BiologicalDystrophinRegenerationNADH Tetrazolium ReductaseMyocardial ContractionCells, CulturedReceptors, CholinergicMyoblastsRats, Sprague-DawleySkeletal Muscle MyosinsTendonsNeuromuscular Blocking AgentsMyocardiumActinsTetanyGlycogenStress, Mechanical