LaminectomyPressureSpinal Cord CompressionBlood PressureDecompression, SurgicalSpinal StenosisLumbar VertebraeLigamentum FlavumCervical VertebraeThoracic VertebraeEpidural SpaceDura MaterArachnoiditisSpinal CanalSpinal Cord DiseasesHydrostatic PressureSpinal NeoplasmsSpinal Cord NeoplasmsCauda EquinaMyelographyIntervertebral Disc DisplacementSpinal OsteophytosisSpinal FusionLumbosacral RegionSpondylolisthesisSpinal DiseasesCervical AtlasHematoma, Epidural, SpinalSpinal Nerve RootsSacrumBlood Pressure DeterminationOssification of Posterior Longitudinal LigamentTreatment OutcomeFailed Back Surgery SyndromePostoperative ComplicationsTorsion, MechanicalNeurosurgical ProceduresSpineParaparesisOssification, HeterotopicDiskectomyRadiculopathySyringomyeliaInternal FixatorsTransducers, PressureHypertensionParaplegiaIntracranial PressureMagnetic Resonance ImagingIntraocular PressureTissue AdhesionsSpinal Cord InjuriesCadaverBlood Pressure Monitoring, AmbulatoryEpidural AbscessKyphosisPolyradiculopathySpinal CordSciaticaArachnoidAir PressureAtmospheric PressureBack PainVenous PressureLongitudinal LigamentsSpondylosisArachnoid CystsRetrospective StudiesTabes DorsalisMeningoceleTime FactorsIntervertebral Disc DegenerationFollow-Up StudiesForaminotomyArterial PressureVentricular PressureHeart RateAtlanto-Axial JointArnold-Chiari MalformationSurgical Procedures, Minimally InvasiveZygapophyseal JointNerve Compression SyndromesShear StrengthLordosisOdontoid ProcessBiomechanical PhenomenaHemodynamicsTomography, X-Ray ComputedDislocationsProspective StudiesSynovial CystPlatybasiaOrthopedic ProceduresIntervertebral DiscCentral Venous PressureTuberculosis, SpinalPulmonary Wedge PressureForamen MagnumMicrosurgeryAntihypertensive Agents