Spinal Nerve RootsSpinal NervesPeripheral Nervous System NeoplasmsNerve Compression SyndromesSpinal CordLumbosacral RegionRadiculopathyLumbar VertebraeSciatic NervePeripheral NervesNeuralgiaPeripheral Nerve InjuriesNerve FibersSpinal Cord InjuriesInjections, SpinalMagnetic Resonance ImagingSciaticaNerve BlockLigationLumbosacral PlexusOptic NerveGanglia, SpinalHyperalgesiaPeripheral Nervous System DiseasesNerve RegenerationIntervertebral Disc DisplacementCauda EquinaRats, Sprague-DawleyTibial NerveSural NerveSpinal CanalFacial NerveSpinal Cord NeoplasmsNerve EndingsPainCervical VertebraeSpinal StenosisTrigeminal NerveMedian NerveNerve CrushPain MeasurementSacrumUlnar NerveMyelographyPain ThresholdFemoral NerveEpidural SpaceAxonsNerve Fibers, MyelinatedNeurons, AfferentSpinal DiseasesSpinal Cord DiseasesMotor NeuronsLaminectomySpinal Cord CompressionCervical PlexusAxotomyNeural ConductionNeuritisBrachial PlexusNerve Growth FactorsRhizotomyMononeuropathiesNerve Growth FactorPosterior Horn CellsPhysical StimulationPhrenic NerveElectric StimulationLow Back Pain