RadiculopathyMeningeal CarcinomatosisLumbosacral RegionLumbosacral PlexusSacrumSpinal Nerve RootsLumbar VertebraePainIntervertebral Disc DisplacementLow Back PainCervical VertebraeSpinal StenosisSpinal CanalInjections, EpiduralPain MeasurementCauda EquinaSciaticaNeck PainBack PainNerve Compression SyndromesEpidural SpaceDiskectomyPolyradiculopathyTotal Disc ReplacementSpinal CordElectrodiagnosisChronic PainPain ManagementIntervertebral DiscSpondylosisSpondylolisthesisLaminectomySpinal DiseasesLigamentum FlavumSpinal FusionPain, PostoperativeSpinal OsteophytosisPost-Traumatic HeadachePain ThresholdSpinal Cord CompressionMagnetic Resonance ImagingZygapophyseal JointBrachial Plexus Neuritis