SciaticaIntervertebral Disc DisplacementPainRadiculopathyLow Back PainPain MeasurementPiriformis Muscle SyndromeChronic PainPain ManagementBack PainInjections, EpiduralDiskectomyLumbar VertebraePain ThresholdChymopapainPain, PostoperativeSpinal Nerve RootsNerve Compression SyndromesAbdominal PainNeck PainPain, IntractableIntervertebral Disc ChemolysisLumbosacral PlexusIntervertebral DiscPelvic PainPain PerceptionPolyradiculopathyFacial PainAcute PainPain, ReferredDisability EvaluationFibrocartilageSpinal DiseasesCauda EquinaSpinal CanalPeripheral Nervous System Neoplasms