RadiculopathySpinal OsteophytosisSpondylosisCervical VertebraeSpinal Cord CompressionSpinal Cord DiseasesLaminectomyDecompression, SurgicalSpinal CanalMyelographyDiskectomySpinal FusionOssification of Posterior Longitudinal LigamentElectrodiagnosisLordosisSpinal StenosisAthetosisLongitudinal LigamentsSpinal Nerve RootsKyphosisTreatment OutcomeMagnetic Resonance ImagingIntervertebral Disc DisplacementEvoked Potentials, SomatosensoryParaparesis, Tropical SpasticSpinal CordLigamentum FlavumRecovery of FunctionLumbar VertebraeSpondylolysis