Spinal CanalSpinal StenosisInjections, EpiduralLidocaineAnesthetics, LocalSpinal CordSpinal Cord CompressionSpinal Cord InjuriesSemicircular CanalsCervical VertebraeLaminectomyLumbar VertebraeThoracic VertebraeEar CanalSpinal Cord DiseasesLigamentum FlavumSpinal DiseasesMyelographySpinal NeoplasmsDecompression, SurgicalSpinal FracturesRoot Canal PreparationSpinal FusionSpinal Cord NeoplasmsSpondylosisSpinal Nerve RootsEpidural SpaceCauda EquinaSpineLongitudinal LigamentsRadiculopathyMagnetic Resonance ImagingLumbosacral RegionPolyradiculopathyArnold-Chiari MalformationSacrumIntervertebral Disc DisplacementRoot Canal IrrigantsDura MaterDental Pulp CavitySpinal InjuriesInjections, SpinalTomography, X-Ray ComputedInternal FixatorsSpondylolisthesisRoot Canal Filling MaterialsSpinal NervesSpinal OsteophytosisAnesthesia, SpinalAxisErysipeloidCervical AtlasTractionOssification of Posterior Longitudinal LigamentAchondroplasiaAnal CanalQuadriplegiaIntervertebral DiscTooth ApexNeck InjuriesSubarachnoid SpaceKyphosisNeurilemmomaVertebroplastyScoliosisRibsDislocationsSyringomyeliaBack PainNerve Compression SyndromesForeign-Body MigrationNeurosurgical ProceduresWounds, StabAngiolipomaBone ScrewsPeripheral Nervous System NeoplasmsMeningesEpidural NeoplasmsZygapophyseal JointMuscular Atrophy, SpinalAtlanto-Axial JointCadaverMeningiomaSynovial CystBone Diseases, DevelopmentalTreatment OutcomeDiskectomyLow Back PainSpinal Cord IschemiaOrthopedic Procedures