Muscular Atrophy, SpinalSpinal Muscular Atrophies of ChildhoodSurvival of Motor Neuron 1 ProteinSMN Complex ProteinsSurvival of Motor Neuron 2 ProteinMuscular AtrophyCyclic AMP Response Element-Binding ProteinAtrophyRNA-Binding ProteinsSpinal CordNerve Tissue ProteinsNeuronal Apoptosis-Inhibitory ProteinExonsMotor NeuronsAnterior Horn CellsMuscular Disorders, AtrophicBulbo-Spinal Atrophy, X-LinkedSpinal Cord InjuriesRibonucleoproteins, Small NuclearDEAD Box Protein 20Chromosomes, Human, Pair 5Spinal Cord DiseasesCoiled BodiesMotor Neuron DiseasesnRNP Core ProteinsDisease Models, AnimalOptic AtrophyPedigreeHeterozygote DetectionMuscle, SkeletalGlycine-tRNA LigaseMice, TransgenicSpinal Nerve RootsInjections, SpinalPhenotypeGene DeletionNeuromuscular Junction DiseasesSpinal NervesHomozygoteRNA SplicingArthrogryposisMultiple System AtrophyElectromyographyAnesthesia, SpinalAxonsNeuromuscular JunctionContractureNerve DegenerationReceptors, AndrogenCharcot-Marie-Tooth DiseaseNeuromuscular DiseasesMutationGene DosageSpinal Cord NeoplasmsSpinal CanalMuscle WeaknessVocal Cord ParalysisSpinal DiseasesSpinal Cord CompressionGenes, RecessiveNeural ConductionChemistry, AnalyticGenes, DominantGenetic LinkageSpinal NeoplasmsFasciculationPrenatal DiagnosisGenetic CounselingSpliceosomesAmyotrophic Lateral SclerosisRespiratory ParalysisAlternative SplicingMagnetic Resonance ImagingBulbar Palsy, ProgressiveSpinal StenosisSpinal Fusion