stages to a disc herniation

aging anatomical anatomy annulus arthritis associated backbone bone breaks bulge bulging canal changes chemical chiropractic closeup column cord damaged degenerate degenerated degeneration disc disease extrusion fibrosus gel hernaition hernia herniated herniation hnp intervertebral lamina like medicine nerve normal nucleus orthopedic osteophyte pain posture prolapse prolapsed protrude protrusion pulposus sequestered sequestration skeleton spinal stages symptom thinning treatment vertebra