RadiculopathySpinal Nerve RootsLumbar VertebraeInjections, EpiduralLumbosacral RegionIntervertebral Disc DisplacementLow Back PainCervical VertebraeMagnetic Resonance ImagingSpinal StenosisSpinal CanalTotal Disc ReplacementSpondylosisLigamentum FlavumDiskectomySpinal OsteophytosisPost-Traumatic HeadacheIntervertebral DiscElectrodiagnosisEpidural SpaceSciaticaNerve Compression SyndromesBrachial Plexus NeuritisLaminectomyNeck PainForaminotomySpinal Cord CompressionSynovial CystPolyradiculopathyHematoma, Epidural, SpinalSacrumLumbosacral PlexusZygapophyseal JointPain MeasurementSpinal Cord DiseasesDecompression, SurgicalSpinal FusionCauda EquinaSpinal DiseasesParaspinal MusclesTreatment Outcome