Muscular Atrophy, SpinalMuscle WeaknessSpinal Muscular Atrophies of ChildhoodSurvival of Motor Neuron 1 ProteinAtrophyMuscular AtrophySMN Complex ProteinsSurvival of Motor Neuron 2 ProteinSpinal CordMusclesMuscle, SkeletalMuscular Disorders, AtrophicBulbo-Spinal Atrophy, X-LinkedSpinal Cord InjuriesMotor NeuronsNeuronal Apoptosis-Inhibitory ProteinMuscle Fibers, SkeletalMuscle ProteinsMuscular DiseasesCyclic AMP Response Element-Binding ProteinMyopathies, NemalineAnterior Horn CellsNeuromuscular DiseasesRespiratory MusclesMuscle ContractionRNA-Binding ProteinsMuscle, SmoothMotor Neuron DiseaseElectromyographySpinal Cord DiseasesNerve Tissue ProteinsMuscle, Smooth, VascularDisease Models, AnimalMuscle StrengthMuscle DevelopmentMuscle FatigueOptic AtrophyMyositisPolymyositisMuscle Fibers, Slow-TwitchMuscle DenervationRibonucleoproteins, Small NuclearMuscular DystrophiesDiaphragmMuscle Fibers, Fast-TwitchExonsDEAD Box Protein 20Charcot-Marie-Tooth DiseasePedigreeSpinal Nerve RootsNeuromuscular JunctionQuadriceps MuscleRespiratory ParalysisBulbar Palsy, ProgressiveInjections, SpinalChromosomes, Human, Pair 5PhenotypeMitochondria, MuscleMice, TransgenicDermatomyositisNeural ConductionSpinal NervesIsometric ContractionHypokalemic Periodic ParalysisMuscle Strength DynamometerMutationMyopathies, Structural, CongenitalCoiled BodiesMultiple System AtrophyOphthalmoplegiaAnesthesia, SpinalMyasthenia GravisMagnetic Resonance ImagingSpinal Cord NeoplasmsContractureNeuromuscular Junction DiseasesReceptors, AndrogenSpinal Cord CompressionSpinal CanalsnRNP Core ProteinsAmyotrophic Lateral SclerosisSpinal DiseasesPostpoliomyelitis SyndromeTime FactorsMyasthenic Syndromes, CongenitalSpinal NeoplasmsMyositis, Inclusion BodyMyocytes, Smooth MuscleNeck MusclesOculomotor MusclesMuscle HypotoniaAxonsMuscular Dystrophy, DuchenneMuscle, StriatedSpinal StenosisMotor ActivityMuscle SpindlesMuscular Dystrophies, Limb-GirdleHereditary Sensory and Motor NeuropathySpinal Fusion