Spinal OsteophytosisLaminectomySpondylosisCervical VertebraeSpinal Cord CompressionSpinal Cord DiseasesDecompression, SurgicalSpinal CanalDiskectomyMyelographyOssification of Posterior Longitudinal LigamentLordosisSpinal FusionRadiculopathyElectrodiagnosisLongitudinal LigamentsSpinal StenosisKyphosisEvoked Potentials, SomatosensoryTreatment OutcomeMagnetic Resonance ImagingRecovery of FunctionSpinal CordCicatrixAthetosisPostoperative ComplicationsFollow-Up StudiesAdenomatous Polyposis Coli ProteinRetrospective StudiesGlial Fibrillary Acidic ProteinLigamentum FlavumParaparesis, Tropical SpasticIntervertebral Disc DisplacementLumbar VertebraeThoracic VertebraeSpondylolysisDura MaterEpidural SpaceInternal FixatorsSpondylitisNeurosurgical ProceduresCervical AtlasSpinal Cord NeoplasmsSpinal NeoplasmsArachnoiditisOssification, Heterotopic