Efferent PathwaysSpinal CordSpinal Cord InjuriesNeurons, EfferentVagotomyReflexAfferent PathwaysVagus NerveSpinal Cord DiseasesSpinal Cord CompressionNeural PathwaysSpinal Cord NeoplasmsNeuronsSympathetic Nervous SystemRats, Sprague-DawleySpinal Cord IschemiaInjections, SpinalHeart RateParaplegiaSpinal Nerve RootsSpinal NervesBlood PressureMotor NeuronsSpinal Cord RegenerationSpinal CanalSpinal NeoplasmsCervical VertebraeAnesthesia, SpinalQuadriplegiaThoracic VertebraeSpinal DiseasesUmbilical CordPosterior Horn CellsLaminectomyLumbosacral RegionRecovery of FunctionNerve RegenerationAxonsSpinal StenosisGanglia, SpinalSpinal Cord StimulationLocomotionSpinal FusionSpinal InjuriesAnterior Horn CellsMyelitisCordotomyParalysisMuscular Atrophy, SpinalPainHyperalgesiaElectric Stimulation TherapyNeuralgiaDisease Models, AnimalMyelographyElectric StimulationSpineEpidural SpaceUrinary Bladder, NeurogenicHematoma, Epidural, SpinalHindlimbNeurons, AfferentNociceptorsLumbar VertebraeTime FactorsLampreysMotor ActivityAutonomic Dysreflexia