Monitoring, IntraoperativeSpinal CordIntraoperative CareIntraoperative PeriodSpinal Cord InjuriesIntraoperative ComplicationsInjections, SpinalAnesthesia, SpinalSpinal Cord DiseasesSpinal NervesSpinal Cord NeoplasmsSpinal Nerve RootsSpinal DiseasesSpinal CanalSpinal Cord CompressionSpinal NeoplasmsSpinal FusionSpinal StenosisPostoperative ComplicationsFrozen SectionsNeuronavigationTreatment OutcomeBlood Loss, SurgicalSurgery, Computer-AssistedSpinal InjuriesIntraoperative AwarenessNeurosurgical ProceduresMuscular Atrophy, SpinalThoracic VertebraeSpinal Cord IschemiaRetrospective StudiesLaminectomySpineGanglia, SpinalCervical VertebraeLumbar VertebraeAnesthesia, GeneralProspective StudiesParaplegiaMotor NeuronsSpinal CurvaturesTime FactorsTuberculosis, SpinalIntraoperative Neurophysiological MonitoringPreoperative Care