Lumbosacral RegionSacrumSpinal CordSpinal Cord InjuriesLumbosacral PlexusSpineSpinal Cord DiseasesSpinal Nerve RootsSpinal Cord CompressionLumbar VertebraeSpinal Cord NeoplasmsSpinal DiseasesInjections, SpinalSpinal Cord IschemiaSpinal NeoplasmsMotor NeuronsSpinal CanalCervical VertebraeSpinal FusionThoracic VertebraeCauda EquinaSpinal NervesRadiculopathyParaplegiaLaminectomySpinal StenosisIntervertebral Disc Displacement