Spinal Nerve RootsSpinal NervesIntervertebral DiscPeripheral Nervous System NeoplasmsNerve Compression SyndromesLumbosacral RegionSpinal CordIntervertebral Disc DisplacementRadiculopathyLumbar VertebraeIntervertebral Disc DegenerationNeuralgiaMagnetic Resonance ImagingSciaticaSpinal Cord InjuriesSpinal DiseasesInjections, SpinalCervical VertebraeSciatic NervePeripheral Nerve InjuriesLumbosacral PlexusLigationPeripheral NervesGanglia, SpinalSpineSpinal CanalHyperalgesiaSacrumSpinal StenosisCauda EquinaNerve FibersPeripheral Nervous System DiseasesDiskectomyFibrocartilageMyelographyNerve BlockSpinal FusionLaminectomyThoracic VertebraeLow Back PainEpidural SpaceRats, Sprague-DawleySpinal Cord CompressionSpinal Cord NeoplasmsPain MeasurementPainSpinal Cord DiseasesDecompression, SurgicalCadaverSpinal OsteophytosisPain ThresholdSpinal NeoplasmsOptic NerveNerve RegenerationIntervertebral Disc ChemolysisCervical PlexusPolyradiculopathyDisease Models, AnimalMononeuropathiesRhizotomy