Muscle Fibers, SkeletalMusclesAtrophyMuscle, SkeletalMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle ProteinsMuscle ContractionMuscle, SmoothMuscular AtrophyMuscle DevelopmentMuscle, Smooth, VascularMuscle DenervationMuscle FatigueMitochondria, MuscleMyofibrilsNerve FibersOculomotor MusclesMuscle SpindlesIsometric ContractionMuscle, StriatedMuscle RelaxationMyocytes, Smooth MuscleMuscle WeaknessMyosin Heavy ChainsNeck MusclesRana temporariaPsoas MusclesMuscular DiseasesOptic AtrophyRespiratory MusclesQuadriceps MusclePapillary MusclesMuscular Atrophy, SpinalMasseter MuscleNeuromuscular JunctionElectromyographySarcomeresSatellite Cells, Skeletal MuscleAbdominal MusclesCalciumMuscle CellsMasticatory MusclesElectric StimulationFacial MusclesIntercostal MusclesMotor NeuronsDiaphragmRabbitsTime FactorsHindlimbDietary FiberPectoralis MusclesMuscular Dystrophy, AnimalRana pipiensAnuraBiomechanical PhenomenaMice, Inbred mdxMultiple System AtrophyThoracicaMembrane PotentialsHindlimb SuspensionCells, CulturedMyoblastsRegenerationHistocytochemistryRats, WistarSarcoplasmic ReticulumSpinal Muscular Atrophies of ChildhoodSarcolemmaTemporal MuscleMotor EndplateDystrophinAction PotentialsGlycogenActinsMicroscopy, ElectronMineral FibersRats, Sprague-DawleyMyostatinSkeletal Muscle MyosinsHypertrophyAgingRNA, MessengerImmunohistochemistryNADH Tetrazolium ReductaseMuscular DystrophiesMyosinsModels, BiologicalTendonsKineticsCatsPharyngeal MusclesCaffeineMuscular Disorders, AtrophicMice, Inbred C57BLReceptors, CholinergicMyoD ProteinMyositisCotton Fiber