Spinal Nerve RootsSpinal NervesPeripheral NervesPeripheral Nervous System NeoplasmsNerve Compression SyndromesSpinal CordLumbosacral RegionPeripheral Nerve InjuriesRadiculopathySciatic NerveLumbar VertebraeNeuralgiaPeripheral Nervous System DiseasesNerve RegenerationNerve FibersNerve BlockSpinal Cord InjuriesInjections, SpinalGanglia, SpinalMagnetic Resonance ImagingNerve Sheath NeoplasmsLigationSciaticaHyperalgesiaLumbosacral PlexusOptic NerveTibial NerveSural NerveNerve CrushNeural ConductionAxonsPeripheral Nervous SystemMedian NerveRats, Sprague-DawleySciatic NeuropathySchwann CellsUlnar NerveCauda EquinaIntervertebral Disc DisplacementFacial NervePainAxotomyFemoral NerveNeurons, AfferentPain MeasurementNerve Fibers, MyelinatedMotor NeuronsTrigeminal NerveSpinal CanalNerve EndingsNeuritisPain ThresholdSpinal Cord NeoplasmsMyelin SheathCervical VertebraeBrachial PlexusSpinal StenosisSacrumNeurilemmomaElectric StimulationMyelographyNerve TissuePosterior Horn CellsWallerian DegenerationNerve Growth FactorsSpinal Cord DiseasesDisease Models, AnimalNeurofibromaRadial NerveEpidural SpaceRhizotomyPhysical StimulationHyperesthesiaLaminectomySpinal Cord CompressionNerve Growth FactorSpinal DiseasesSensory Receptor CellsCervical PlexusAnalgesicsMononeuropathiesPhrenic NerveCranial NervesAnesthetics, LocalBehavior, AnimalLow Back Pain