Spinal CordSpinal Cord InjuriesSpinal Cord DiseasesSpinal Cord CompressionSpinal Cord NeoplasmsSciatic NerveSpinal NervesSpinal Cord IschemiaSpinal Nerve RootsPeripheral NervesNerve RegenerationInjections, SpinalNerve FibersParaplegiaMotor NeuronsOptic NerveSpinal Cord RegenerationAxonsSpinal CanalPeripheral Nerve InjuriesCervical VertebraeSpinal NeoplasmsAnesthesia, SpinalRats, Sprague-DawleyQuadriplegiaTibial NerveThoracic VertebraeSpinal DiseasesNerve BlockNerve CrushPosterior Horn CellsGanglia, SpinalNerve EndingsSural NerveUmbilical CordLaminectomyMedian NerveRecovery of FunctionLumbosacral RegionFacial NerveElectric StimulationSpinal StenosisNerve Growth FactorsLocomotionUlnar NervePhrenic NerveSpinal Cord StimulationSpinal FusionSpinal InjuriesFemoral NerveAnterior Horn CellsNeurons, AfferentNeuralgiaCordotomyMyelitisPainHyperalgesia