LaminectomyLumbar VertebraeSpinal NervesSpinal Nerve RootsSpinal CordPressureSpinal Cord CompressionSpinal Cord InjuriesNeuralgiaBlood PressureHydrostatic PressureSpinal StenosisLumbosacral RegionDecompression, SurgicalInjections, SpinalLigationPeripheral Nerve InjuriesSciatic NerveSpinal Cord NeoplasmsSpinal Cord DiseasesSpinal CanalCervical VertebraePeripheral NervesThoracic VertebraeHyperalgesiaSpinal NeoplasmsRadiculopathyNerve FibersGanglia, SpinalLigamentum FlavumCauda EquinaMyelographySpinal FusionPeripheral Nervous System DiseasesEpidural SpaceRats, Sprague-DawleySpinal DiseasesDura MaterNerve Compression SyndromesIntervertebral Disc DisplacementArachnoiditisSciaticaSpineSpinal OsteophytosisPain