Intercostal NervesSpinal NervesSpinal Nerve RootsSpinal CordThoracic VertebraeSpinal Cord InjuriesNeuralgiaLumbosacral RegionInjections, SpinalSpinal Cord NeoplasmsPeripheral Nerve InjuriesSciatic NerveLigationThoraxPeripheral NervesLaminectomySpinal Cord CompressionHyperalgesiaRats, Sprague-DawleyParaparesisSpinal Cord DiseasesEpidural NeoplasmsNerve FibersGanglia, SpinalPeripheral Nervous System DiseasesNerve RegenerationParaplegiaMotor NeuronsSpinal CanalAxonsSplanchnic NervesNeurons, AfferentSpinal NeoplasmsMyelographyPainOptic NerveRadiculopathyAfferent PathwaysElectric StimulationThoracic NervesPain ThresholdNerve Compression SyndromesAutonomic Fibers, PreganglionicAutonomic DysreflexiaMononeuropathiesTuberculosis, SpinalPain MeasurementCervical VertebraeNeuronal Tract-TracersPosterior Horn CellsNeuritisHindlimbDecompression, SurgicalDisease Models, AnimalRecovery of FunctionAxotomyPeripheral Nervous System NeoplasmsLigamentum FlavumNeural ConductionHyperesthesiaPhysical StimulationEpidural SpaceMagnetic Resonance ImagingLumbar VertebraeCatsAnalgesics