ContusionsSpinal Cord InjuriesSpinal CordRecovery of FunctionCordotomyLocomotionRats, Sprague-DawleyLaminectomyDisease Models, AnimalMotor ActivityCervical VertebraeSpinal Cord DiseasesSpinal Cord CompressionSpinal Cord NeoplasmsSpinal Cord IschemiaInjections, SpinalParaplegiaSpinal Nerve RootsMotor NeuronsSpinal NervesBrain InjuriesHeart InjuriesThoracic VertebraeSpinal Cord RegenerationWounds, NonpenetratingCerebral Hemorrhage, TraumaticThoracic InjuriesNerve RegenerationLung InjurySpinal CanalSpinal NeoplasmsAxonsAnesthesia, SpinalQuadriplegiaMyelitisSpinal InjuriesSpinal DiseasesUmbilical CordParalysisPosterior Horn CellsLumbosacral RegionBrain Hemorrhage, TraumaticHyperalgesiaSpinal StenosisGanglia, SpinalSpinal Cord StimulationBrain ConcussionSpinal FusionHindlimbUrinary Bladder, NeurogenicNeuronsForelimbNeuralgiaAnterior Horn CellsTime FactorsMuscular Atrophy, SpinalPainImmunohistochemistryElectric Stimulation TherapyPyramidal TractsMagnetic Resonance ImagingMyelin SheathNeuroprotective AgentsMyelographyPhysical Stimulation