Spinal Nerve RootsSpinal NervesSpinal Cord InjuriesSpinal CordPeripheral Nervous System NeoplasmsNerve Compression SyndromesLumbosacral RegionRadiculopathyLumbar VertebraeNeuralgiaInjections, SpinalMagnetic Resonance ImagingPeripheral Nerve InjuriesSciatic NervePeripheral NervesLigationSciaticaLumbosacral PlexusHyperalgesiaWounds and InjuriesGanglia, SpinalCervical VertebraeRats, Sprague-DawleyNerve RegenerationNerve FibersPeripheral Nervous System DiseasesParaplegiaCauda EquinaQuadriplegiaIntervertebral Disc DisplacementSpinal Cord NeoplasmsSpinal Cord DiseasesSpinal Cord CompressionNerve BlockPainSpinal CanalPain MeasurementBrain InjuriesMyelographyDisease Models, AnimalSpinal StenosisLaminectomySacrumRecovery of FunctionAxonsThoracic VertebraeMotor NeuronsPain ThresholdEpidural SpaceSpinal InjuriesOptic NervePosterior Horn CellsSpinal DiseasesAthletic InjuriesPhysical StimulationAxotomyNeurons, AfferentCervical PlexusTibial NerveRhizotomyNerve Fibers, MyelinatedHyperesthesiaParalysisMononeuropathiesSpinal NeoplasmsInjury Severity ScoreBrachial PlexusDecompression, SurgicalAnalgesicsReperfusion InjuryLow Back PainTooth Root