Muscle Fibers, SkeletalMusclesMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle, SkeletalMuscle ContractionMuscle ProteinsMuscle DevelopmentMuscle, SmoothNerve FibersMuscle DenervationMuscle, Smooth, VascularMyofibrilsMuscle FatigueRana temporariaIsometric ContractionMitochondria, MuscleMyosin Heavy ChainsPsoas MusclesDietary FiberMuscle SpindlesOculomotor MusclesSarcomeresNeuromuscular JunctionMuscular AtrophyMuscular DiseasesCalciumMuscle RelaxationMuscle, StriatedRana pipiensMuscle WeaknessElectric StimulationThoracicaTime FactorsNeck MusclesMyocytes, Smooth MuscleMotor NeuronsDiaphragmRabbitsElectromyographyMasseter MuscleMuscular Dystrophy, AnimalAnuraSatellite Cells, Skeletal MuscleQuadriceps MuscleMineral FibersHindlimbRespiratory MusclesPapillary MusclesMice, Inbred mdxMembrane PotentialsMasticatory MusclesAbdominal MusclesMyosinsIntercostal MusclesMuscle CellsHistocytochemistryFacial MusclesBiomechanical PhenomenaMotor EndplateSarcoplasmic ReticulumAction PotentialsCotton FiberMicroscopy, ElectronPectoralis MusclesSarcolemmaDystrophinRegenerationNADH Tetrazolium ReductaseCells, CulturedMyoblastsRats, WistarRana esculentaRanidaeSkeletal Muscle MyosinsImmunohistochemistryCaffeineMuscular DystrophiesModels, BiologicalActinsNerve Fibers, MyelinatedTendonsNeural ConductionPurkinje FibersKineticsGlycogenCrustaceaRats, Sprague-DawleyStress FibersCatsReceptors, CholinergicHypertrophyMice, Inbred C57BLAgingStress, MechanicalRNA, MessengerProtein IsoformsElectrophysiologyTemporal MuscleMyositis