Spinal CordAnesthesia, GeneralAnesthesiaAnesthesia, SpinalAnesthesia, LocalSpinal Cord InjuriesAnesthesia, EpiduralInjectionsAnesthesia, InhalationAnesthesia, ConductionAnesthesia, IntravenousAnesthesia, ObstetricalAnesthesia Recovery PeriodAnesthesia, DentalInjections, SpinalAnesthetics, LocalAnesthetics, IntravenousAnesthetics, InhalationAdjuvants, AnesthesiaPropofolSpinal NervesIsofluraneSpinal Cord DiseasesMethyl EthersSpinal Nerve RootsAnesthesiologyAnesthetics, CombinedMonitoring, IntraoperativeLidocaineInjections, IntravenousSpinal Cord NeoplasmsSpinal CanalNitrous OxideAnestheticsSpinal DiseasesSpinal Cord CompressionSpinal NeoplasmsInjections, IntramuscularBupivacaineHalothaneSpinal StenosisSpinal FusionNerve BlockFentanylAnesthesia, Closed-CircuitKetamineTime FactorsRats, Sprague-DawleyAnesthetics, GeneralInjections, SubcutaneousPreanesthetic MedicationInjections, IntralesionalInjections, Intra-ArticularAmbulatory Surgical ProceduresThiopentalAnesthesia, CaudalSpinal InjuriesPain MeasurementMuscular Atrophy, SpinalPentobarbitalInjections, IntraperitonealSpinal Cord IschemiaGanglia, SpinalAnesthetics, DissociativeXylazineInjections, EpiduralPainPain, PostoperativeIntraoperative ComplicationsEnfluraneMotor NeuronsIntubation, IntratrachealConscious SedationSpineThoracic VertebraeDose-Response Relationship, DrugAnesthesia Department, HospitalCesarean SectionDisease Models, AnimalLumbosacral RegionAnesthesia, IntratrachealParaplegiaInjections, IntraventricularAnalgesics, OpioidIntraoperative PeriodPrilocaineLaminectomyProspective StudiesTuberculosis, SpinalLumbar VertebraePosterior Horn CellsMethohexitalInjections, IntradermalMepivacaineElectroencephalographyCervical VertebraeAnesthesia and AnalgesiaDouble-Blind MethodTreatment OutcomeNeedles