LaminectomySpinal Cord CompressionPainDecompression, SurgicalSpinal StenosisLumbar VertebraeLigamentum FlavumCervical VertebraeThoracic VertebraeBack PainEpidural SpaceChronic PainPain ManagementDura MaterArachnoiditisSpinal CanalSpinal Cord DiseasesLow Back PainPain, PostoperativeSpinal NeoplasmsIntervertebral Disc DisplacementSpinal Cord NeoplasmsCauda EquinaMyelographySpinal OsteophytosisLumbosacral RegionPain ThresholdSpinal Fusion