Spinal Cord DiseasesSpinal CordMuscular Atrophy, SpinalPeripheral NervesSpinal Cord InjuriesSMN Complex ProteinsOptic Nerve DiseasesSurvival of Motor Neuron 1 ProteinPeripheral Nerve InjuriesOlfactory Nerve DiseasesVagus Nerve DiseasesSciatic NerveRibonucleoproteins, Small NuclearMotor NeuronsHypoglossal Nerve DiseasesVestibulocochlear Nerve DiseasesGlossopharyngeal Nerve DiseasesNerve Regeneration