Spinal StenosisCervical VertebraeSpinal CordSpinal CanalLumbar VertebraeSpinal Cord InjuriesDecompression, SurgicalLaminectomySpinal Cord CompressionSpondylolisthesisInjections, EpiduralCarotid StenosisRadiculopathyAortic Valve StenosisSpondylosisSpinal FusionMyelographyLigamentum FlavumSpinal DiseasesIntervertebral Disc DisplacementSpinal Cord DiseasesSpinal Nerve RootsCoronary StenosisLumbosacral RegionSpinal Cord NeoplasmsQuadriplegiaMagnetic Resonance ImagingSciaticaTracheal StenosisSpinal InjuriesPolyradiculopathyTreatment OutcomeLow Back PainPhrenic NerveIntermittent ClaudicationRecovery of FunctionPyloric StenosisPain MeasurementMitral Valve StenosisNeurosurgical ProceduresDisability EvaluationEpidural SpaceConstriction, PathologicPulmonary Valve StenosisDura MaterBack PainInjections, SpinalSteroidsForelimbMyelitisAnesthetics, LocalOrthopedic ProceduresFailed Back Surgery SyndromeSacrumFollow-Up StudiesTomography, X-Ray ComputedAnterior Horn CellsCauda EquinaNeckProstheses and ImplantsMotor NeuronsRetrospective StudiesSpinal OsteophytosisSpineTissue AdhesionsThoracic VertebraeParalysisSpinal NeoplasmsSpinal NervesProspective StudiesAnesthesia, SpinalFluoroscopySurgical Procedures, Minimally InvasivePostoperative ComplicationsSeverity of Illness IndexTime FactorsNeck InjuriesElectromyographyLongitudinal LigamentsContusions