Spinal PunctureSpinal CordAnesthesia, SpinalSpinal Cord InjuriesPuncturesSpinal Cord DiseasesSpinal Cord NeoplasmsSpinal Cord CompressionInjections, SpinalSpinal NervesSpinal Nerve RootsSpinal Cord IschemiaSpinal CanalSpinal NeoplasmsSpinal DiseasesParaplegiaSpinal StenosisPost-Dural Puncture HeadacheSpinal FusionMotor NeuronsSpinal InjuriesThoracic VertebraeSpinal Cord RegenerationGanglia, SpinalCervical VertebraeMuscular Atrophy, SpinalLaminectomyPosterior Horn CellsLumbosacral RegionQuadriplegiaRats, Sprague-DawleySpineHematoma, Epidural, SpinalLocomotionTuberculosis, SpinalRecovery of FunctionAxonsLumbar VertebraeNerve RegenerationPainMyelographyAnterior Horn CellsSpinal Cord StimulationEpidural SpaceSpinal CurvaturesCordotomyHyperalgesiaMyelitisDisease Models, AnimalNeuralgiaParalysisSpinal Muscular Atrophies of ChildhoodDura MaterNeuronsNeedlesPain MeasurementSpinal FracturesUmbilical CordElectric Stimulation TherapyTime FactorsElectric StimulationNociceptorsAfferent PathwaysMagnetic Resonance ImagingReflexNeurons, AfferentHindlimbTrigeminal Nucleus, Spinal