Muscular Atrophy, SpinalMuscular AtrophyAtrophySpinal Muscular Atrophies of ChildhoodSurvival of Motor Neuron 1 ProteinSMN Complex ProteinsSurvival of Motor Neuron 2 ProteinSpinal CordMuscular Disorders, AtrophicMuscle, SkeletalMuscle ProteinsHindlimb SuspensionMusclesSKP Cullin F-Box Protein LigasesMuscle Fibers, SkeletalBulbo-Spinal Atrophy, X-LinkedSpinal Cord InjuriesMotor NeuronsNeuronal Apoptosis-Inhibitory ProteinOptic AtrophyMuscle DenervationCyclic AMP Response Element-Binding ProteinAnterior Horn CellsRNA-Binding ProteinsMyostatinMuscle, SmoothMuscle WeaknessMuscle ContractionMultiple System AtrophyMuscle DevelopmentNerve Tissue ProteinsDisease Models, AnimalMotor Neuron DiseaseMuscle, Smooth, VascularMuscle Fibers, Slow-TwitchMuscle Fibers, Fast-TwitchSpinal Cord DiseasesImmobilizationElectromyographyRibonucleoproteins, Small NuclearMice, TransgenicMuscle FatigueDEAD Box Protein 20Mitochondria, MuscleOlivopontocerebellar AtrophiesMagnetic Resonance ImagingNeuromuscular DiseasesMuscular DiseasesSatellite Cells, Skeletal MuscleSpinal Nerve RootsExonsChromosomes, Human, Pair 5Organ SizeUbiquitin-Protein LigasesCachexiaGyrate AtrophyInjections, SpinalHindlimbSpinal NervesNeuromuscular JunctionCoiled BodiesQuadriceps MuscleRats, Sprague-DawleyPhenotypeMyosin Heavy ChainsReceptors, AndrogenRNA, MessengerAnesthesia, SpinalsnRNP Core ProteinsGeographic AtrophyTime FactorsGene Expression RegulationMice, Inbred C57BLBed RestNeural ConductionPedigreeNerve DegenerationIsometric ContractionSpinal Cord NeoplasmsSpinal CanalSignal TransductionMice, KnockoutMuscle CellsSarcopeniaAxonsMyoblastsSpinal DiseasesSpinal Cord CompressionMyofibrilsMyocytes, Smooth MuscleAmyotrophic Lateral SclerosisCells, CulturedMutationSpace FlightNeck MusclesProteasome Endopeptidase ComplexOculomotor MusclesSpinal NeoplasmsRats, WistarBulbar Palsy, Progressive