Spinal CordSpinal Cord InjuriesCervical VertebraeSpinal Cord DiseasesSpinal Cord CompressionSpinal Cord NeoplasmsSpinal CanalSpinal Nerve RootsQuadriplegiaSpinal NervesInjections, SpinalMotor NeuronsSpinal InjuriesPhrenic NerveSpinal Cord IschemiaSciatic NerveNerve RegenerationSpinal StenosisLaminectomyPeripheral NervesSpinal NeoplasmsSpinal DiseasesMyelitisAnesthesia, SpinalAnterior Horn CellsRecovery of FunctionMyelographyParaplegiaRats, Sprague-DawleySpinal FusionParalysisNerve FibersAxonsForelimbThoracic VertebraeSpondylosisMagnetic Resonance ImagingPosterior Horn CellsSpinal Cord RegenerationSpinal Cord StimulationGanglia, SpinalOptic NerveElectric StimulationContusionsNeckNerve TissuePyramidal TractsLocomotionAfferent PathwaysMuscular Atrophy, SpinalElectromyographyPeripheral Nerve InjuriesLumbosacral RegionElectric Stimulation TherapyDisease Models, AnimalRespiratory ParalysisTibial NerveDecompression, SurgicalEpidural SpaceNeurons, AfferentNerve Fibers, MyelinatedReflexLongitudinal LigamentsCatsBrain StemNeck InjuriesNerve BlockNeuronsNerve CrushNeural ConductionPainRed NucleusSural NerveHyperalgesiaNerve EndingsNeuralgiaSyringomyeliaDura MaterCordotomyTrigeminal Nucleus, SpinalAutonomic DysreflexiaSpineUmbilical CordMedian NerveMedulla OblongataEpidural AbscessTime FactorsEfferent PathwaysHematoma, Epidural, SpinalSpinal OsteophytosisNerve Growth FactorsLumbar VertebraeMotor ActivityTuberculosis, SpinalFacial NerveImmunohistochemistryKlippel-Feil SyndromeUlnar NerveNeurologic ExaminationFemoral Nerve