NeedlesSpinal CordAnesthesia, GeneralAnesthesiaAnesthesia, SpinalAnesthesia, LocalBiopsy, NeedleSpinal Cord InjuriesAnesthesia, EpiduralAnesthesia, ConductionAnesthesia, InhalationAnesthesia, IntravenousAnesthesia, ObstetricalAnesthesia Recovery PeriodAnesthesia, DentalInjections, SpinalAnesthetics, InhalationAnesthetics, IntravenousAnesthetics, LocalAdjuvants, AnesthesiaPropofolSpinal NervesSpinal Cord DiseasesIsofluraneSpinal Nerve RootsAnesthesiologyMethyl EthersAnesthetics, CombinedMonitoring, IntraoperativeSpinal CanalSpinal Cord NeoplasmsSpinal DiseasesNitrous OxideSpinal Cord CompressionAnestheticsLidocaineSpinal NeoplasmsNerve BlockHalothaneBupivacaineSpinal StenosisSpinal FusionFentanylAnesthesia, Closed-CircuitAnesthetics, GeneralAmbulatory Surgical ProceduresKetaminePreanesthetic MedicationAnesthesia, CaudalNeedle SharingSpinal InjuriesBiopsy, Large-Core NeedleThiopentalMuscular Atrophy, SpinalBiopsy, Fine-NeedlePain MeasurementSpinal Cord IschemiaPentobarbitalIntraoperative ComplicationsAnesthetics, DissociativeGanglia, SpinalPain, PostoperativeEnfluraneThoracic VertebraeSpineXylazineConscious SedationSpinal PunctureIntubation, IntratrachealMotor NeuronsTime FactorsAnesthesia Department, HospitalCesarean SectionPainProspective StudiesEpidural SpaceAnesthesia, IntratrachealIntraoperative PeriodParaplegiaLumbosacral RegionPrilocaineRats, Sprague-DawleyTuberculosis, SpinalLaminectomyLumbar VertebraeCervical VertebraeMepivacaineAnalgesics, OpioidAnesthesia and AnalgesiaHematoma, Epidural, SpinalMethohexitalSyringesPostoperative ComplicationsEquipment DesignSpinal CurvaturesPosterior Horn CellsElectroencephalographyEndoscopic Ultrasound-Guided Fine Needle AspirationAlfentanilInjections