MassachusettsMuscular Atrophy, SpinalSpinal Muscular Atrophies of ChildhoodBostonHospitals, GeneralSurvival of Motor Neuron 1 ProteinAtrophySMN Complex ProteinsMuscular AtrophySurvival of Motor Neuron 2 ProteinSpinal CordHealth StatusQuestionnairesQuality of LifeCaregiversRetrospective StudiesMuscular Disorders, AtrophicBulbo-Spinal Atrophy, X-LinkedSpinal Cord InjuriesTreatment OutcomeNeuronal Apoptosis-Inhibitory ProteinCyclic AMP Response Element-Binding ProteinMotor NeuronsAnterior Horn CellsRNA-Binding ProteinsNerve Tissue ProteinsSpinal Cord DiseasesOptic AtrophyMotor Neuron DiseaseRibonucleoproteins, Small NuclearDEAD Box Protein 20Chromosomes, Human, Pair 5Spinal Nerve RootsInjections, SpinalDisease Models, AnimalExonsMotor ActivitySpinal NervesCoiled BodiesMultiple System AtrophyAnesthesia, SpinalReceptors, AndrogensnRNP Core ProteinsPhysical FitnessMuscle, SkeletalSpinal Cord NeoplasmsSpinal CanalSpinal DiseasesSpinal Cord CompressionSpinal NeoplasmsPedigreeUniversal CoverageMice, TransgenicSpinal StenosisBulbar Palsy, ProgressiveState Health PlansMuscle WeaknessElectromyographySpinal FusionMagnetic Resonance ImagingPhenotypeTime FactorsPhysical Therapy ModalitiesCharcot-Marie-Tooth DiseaseNerve DegenerationNeuromuscular DiseasesHeterozygote DetectionContractureOlivopontocerebellar AtrophiesAxonsExerciseGlycine-tRNA LigaseNeural ConductionHealth Care ReformArthrogryposisNew HampshireGene DeletionMutationVocal Cord ParalysisSpinal InjuriesHomozygoteGyrate AtrophyNeuromuscular Junction DiseasesUnited StatesNeuromuscular JunctionRNA SplicingTrinucleotide Repeat ExpansionAmyotrophic Lateral SclerosisGenetic LinkageGanglia, SpinalSpinal Cord IschemiaGenes, Recessive