Muscular Atrophy, SpinalSpinal Muscular Atrophies of ChildhoodSurvival of Motor Neuron 1 ProteinSMN Complex ProteinsSurvival of Motor Neuron 2 ProteinMuscular AtrophyCyclic AMP Response Element-Binding ProteinRNA-Binding ProteinsNerve Tissue ProteinsAtrophyExonsNeuronal Apoptosis-Inhibitory ProteinSpinal CordMotor NeuronsAnterior Horn CellsRibonucleoproteins, Small NuclearDEAD Box Protein 20Muscular Disorders, AtrophicChromosomes, Human, Pair 5Bulbo-Spinal Atrophy, X-LinkedSpinal Cord InjuriesCoiled BodiessnRNP Core ProteinsSpinal Cord DiseasesMotor Neuron DiseaseDisease Models, AnimalHeterozygote DetectionPedigreeGlycine-tRNA LigaseGene DeletionNeuromuscular Junction DiseasesPhenotypeRNA SplicingMice, TransgenicHomozygoteMuscle, SkeletalOptic AtrophyArthrogryposisNeuromuscular JunctionGene DosageAxonsContractureElectromyographyNeuromuscular DiseasesNerve DegenerationMutationChemistry, AnalyticCharcot-Marie-Tooth DiseaseGenes, RecessiveFasciculationPrenatal DiagnosisVocal Cord ParalysisGenes, DominantSpinal Nerve Roots