Intraoperative CareAnestheticsIntraoperative PeriodSpinal CordMonitoring, IntraoperativeAnesthetics, LocalAnesthetics, InhalationSpinal Cord InjuriesIntraoperative ComplicationsAnesthetics, GeneralAnesthetics, IntravenousIsofluraneHalothaneAnesthetics, CombinedAnesthesia, SpinalLidocaineAnesthesia, GeneralEnfluraneInjections, SpinalAnesthesiaMethyl EthersSpinal Cord DiseasesAnesthesia, LocalSpinal NervesPropofolBupivacaineSpinal Nerve RootsSpinal Cord NeoplasmsSpinal DiseasesAnesthetics, DissociativeSpinal CanalSpinal Cord CompressionSpinal NeoplasmsSpinal FusionAnesthesia, InhalationPostoperative ComplicationsMethoxyfluraneSpinal StenosisNerve BlockKetamineNitrous OxideTreatment OutcomeAnesthesia, DentalFrozen SectionsBenzocaineNeuronavigationTetracaineThiopentalIntraoperative AwarenessBlood Loss, SurgicalAnesthesiologyPrilocaineAnesthesia, ObstetricalAnesthesia, IntravenousAnesthesia, EpiduralNeurosurgical ProceduresProcaineEtomidateAnesthesia Recovery PeriodRetrospective StudiesSurgery, Computer-AssistedFentanylSpinal InjuriesTime FactorsThoracic VertebraeMuscular Atrophy, SpinalProspective StudiesAnesthesia, ConductionEtherLaminectomyAdjuvants, AnesthesiaPain, PostoperativePentobarbitalSpineGanglia, SpinalSpinal Cord IschemiaPain MeasurementMepivacaineDibucaineRats, Sprague-DawleyMotor NeuronsPreoperative CareLumbar VertebraeCervical VertebraeDose-Response Relationship, DrugEtidocaineParaplegiaCarticaineSpinal CurvaturesPainChloroformTuberculosis, SpinalAmbulatory Surgical ProceduresIntraoperative Neurophysiological MonitoringXylazinePerioperative CareSurgical Procedures, OperativePosterior Horn CellsMagnetic Resonance ImagingAnalgesics, Opioid