Muscular Atrophy, SpinalSpinal Muscular Atrophies of ChildhoodSurvival of Motor Neuron 1 ProteinAtrophySMN Complex ProteinsMuscular AtrophySurvival of Motor Neuron 2 ProteinSpinal CordMuscular Disorders, AtrophicBulbo-Spinal Atrophy, X-LinkedSpinal Cord InjuriesNeuronal 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 NeoplasmsPedigreeMice, TransgenicSpinal StenosisBulbar Palsy, ProgressiveMuscle WeaknessElectromyographySpinal FusionMagnetic Resonance ImagingPhenotypePhysical Therapy ModalitiesCharcot-Marie-Tooth DiseaseNerve DegenerationNeuromuscular DiseasesHeterozygote DetectionContractureOlivopontocerebellar AtrophiesAxonsGlycine-tRNA LigaseNeural ConductionArthrogryposisGene DeletionMutationExerciseVocal Cord ParalysisSpinal InjuriesHomozygoteGyrate AtrophyNeuromuscular Junction DiseasesNeuromuscular JunctionRNA SplicingTrinucleotide Repeat ExpansionAmyotrophic Lateral SclerosisGenetic LinkageTime FactorsGanglia, SpinalSpinal Cord IschemiaGenes, RecessiveSural NerveGene DosageGeographic AtrophyTrinucleotide RepeatsGenes, DominantBrainIntranuclear Inclusion BodiesMyelographyParaplegiaMuscle StrengthMolecular Sequence DataSpineInclusion BodiesFasciculationMyoclonic Epilepsies, ProgressiveMusclesChemistry, AnalyticThoracic VertebraeUlnar NervePhysical ExaminationPrenatal DiagnosisRespiratory Paralysis