Electric Stimulation TherapySpinal Cord StimulationSpinal CordElectrodes, ImplantedComplex Regional Pain SyndromesEpidural SpacePain ClinicsSpinal Cord InjuriesSpinal Cord DiseasesSpinal Cord CompressionSpinal Cord NeoplasmsSpinal Cord IschemiaInjections, SpinalParaplegiaSpinal Nerve RootsSpinal NervesMotor NeuronsSpinal Cord RegenerationSpinal CanalSpinal NeoplasmsCervical VertebraeAnesthesia, SpinalQuadriplegiaThoracic VertebraeSpinal DiseasesRats, Sprague-DawleyUmbilical CordPosterior Horn CellsLaminectomyLumbosacral RegionRecovery of FunctionNerve RegenerationAxonsSpinal StenosisGanglia, SpinalLocomotionSpinal FusionSpinal InjuriesAnterior Horn CellsMyelitisCordotomyPainParalysisNeuronsElectric StimulationMuscular Atrophy, SpinalDisease Models, AnimalNeuralgiaHyperalgesiaTime FactorsUrinary Bladder, NeurogenicMyelographyAfferent PathwaysNeurons, AfferentSpinePhysical StimulationNociceptorsHematoma, Epidural, SpinalHindlimbLumbar VertebraeReflexElectromyographyPain MeasurementEvoked Potentials, SomatosensoryMagnetic Resonance ImagingLampreysMotor Activity