Lumbosacral RegionIntervertebral DiscSacrumIntervertebral Disc DegenerationIntervertebral Disc DisplacementLumbosacral PlexusLumbar VertebraeFibrocartilageSpinal DiseasesJointsSpineIntervertebral Disc ChemolysisDiskectomyAggrecansRadiculopathyWeight-BearingCompressive StrengthCervical VertebraeDiscitisLow Back PainSciaticaNotochordSpinal Nerve RootsChymopapainBiomechanical PhenomenaThoracic VertebraeSpondylolisthesisSpinal OsteophytosisSpinal FusionCollagen Type IIMyelographyMagnetic Resonance ImagingSpinal StenosisKnee JointPolyradiculopathyLaminectomyCauda EquinaScoliosisSpinal CanalCadaverSpinal CordProteoglycansLordosisCollagen Type IXGlycosaminoglycansJoint DiseasesBack PainDiskectomy, PercutaneousEpidural SpaceDecompression, Surgical