Spinal Muscular Atrophies of ChildhoodMuscular Atrophy, SpinalGlycine-tRNA LigaseMuscular AtrophyAtrophySpinal CordSurvival of Motor Neuron 1 ProteinSMN Complex ProteinsSurvival of Motor Neuron 2 ProteinMuscular Disorders, AtrophicSpinal Cord InjuriesMuscle, SkeletalMuscle ProteinsHindlimb SuspensionMusclesSKP Cullin F-Box Protein LigasesMuscle Fibers, SkeletalBulbo-Spinal Atrophy, X-LinkedMotor NeuronsNeuronal Apoptosis-Inhibitory ProteinOptic AtrophyMuscle DenervationAnterior Horn CellsCyclic AMP Response Element-Binding ProteinSpinal Cord DiseasesInjections, SpinalRNA-Binding ProteinsSpinal Nerve RootsMyostatinSpinal NervesMuscle WeaknessMuscle, SmoothMuscle ContractionMultiple System AtrophyNerve Tissue ProteinsDisease Models, AnimalAnesthesia, SpinalMuscle DevelopmentMotor Neuron DiseaseSpinal Cord NeoplasmsSpinal CanalMuscle, Smooth, VascularSpinal DiseasesMuscle Fibers, Slow-TwitchSpinal Cord CompressionMuscle Fibers, Fast-TwitchImmobilizationElectromyographySpinal NeoplasmsSpinal StenosisMagnetic Resonance ImagingRibonucleoproteins, Small NuclearMice, TransgenicSpinal FusionMuscle FatigueDEAD Box Protein 20Rats, Sprague-DawleyNeuromuscular DiseasesOlivopontocerebellar AtrophiesMitochondria, MuscleMuscular DiseasesHindlimbExonsSatellite Cells, Skeletal MuscleChromosomes, Human, Pair 5Organ SizeUbiquitin-Protein LigasesCachexiaSpinal InjuriesGyrate AtrophyTime FactorsAxonsNeuromuscular JunctionCoiled BodiesQuadriceps MuscleRNA, MessengerPhenotypeGanglia, SpinalNeural ConductionReceptors, AndrogenSpinal Cord IschemiaGene Expression RegulationMyosin Heavy ChainsMice, Inbred C57BLNerve DegenerationsnRNP Core ProteinsGeographic AtrophyMice, KnockoutAmyotrophic Lateral SclerosisBed RestSignal TransductionPedigreeIsometric ContractionCells, CulturedRats, WistarParaplegiaMuscle Cells