Myositis, Inclusion BodyMuscle WeaknessMusclesMuscle, SkeletalMuscle ProteinsMyopathies, NemalineMuscle Fibers, SkeletalMuscular DiseasesRespiratory MusclesMuscle ContractionMuscle, SmoothNeuromuscular DiseasesMuscle, Smooth, VascularMuscle DevelopmentMuscle FatigueMuscular AtrophyPolymyositisMyositisMuscle Fibers, Slow-TwitchMuscle Fibers, Fast-TwitchDiaphragmMuscle StrengthQuadriceps MuscleElectromyographyMitochondria, MuscleDermatomyositisHypokalemic Periodic ParalysisMuscle DenervationIsometric ContractionMyopathies, Structural, CongenitalMuscular DystrophiesMyasthenia GravisMyasthenic Syndromes, CongenitalMyocytes, Smooth MuscleOculomotor MusclesNeck MusclesMuscle HypotoniaRespiratory ParalysisMuscular Dystrophy, DuchenneMuscle, StriatedMuscle Strength DynamometerMuscular Dystrophies, Limb-GirdleMuscle SpindlesMuscle RelaxationNeuromuscular JunctionPapillary MusclesRhabdomyolysisMyosin Heavy ChainsOphthalmoplegiaDistal MyopathiesLambert-Eaton Myasthenic SyndromeHypokalemiaMuscular Dystrophy, AnimalMice, Inbred mdxMyotonic DystrophyMyofibrilsAbdominal MusclesFacial MusclesCharcot-Marie-Tooth DiseaseMuscle CellsReceptors, CholinergicMonocrotophosMasseter MuscleGlycogen Storage Disease Type IICreatine KinaseMasticatory MusclesMyotoniaIntercostal MusclesParalyses, Familial PeriodicBiomechanical PhenomenaPostpoliomyelitis SyndromeInspiratory CapacityTime FactorsDystrophinMotor NeuronsMuscular Atrophy, SpinalMotor Neuron DiseasePedigreeSarcomeresSatellite Cells, Skeletal MusclePhenotypeCalciumParalysisMyoblastsParalysis, Hyperkalemic PeriodicElectric StimulationTorqueDisease Models, Animal