stenosis, lumbar disk herniation

accessory anatomical anatomy anulus arch arthrosis articular biology board body bone bony collagen column cord costal crossing degeneration degenerative didactic disk extrusion fiber fibers fibrosus fibrous foramen ganglion herniated herniation human intervertebral lamina ligament lumbar mamillary marginal medical medically medicine nucleus osteoarthritis osteophytes pedicle physical process protrusion pulposus ridge ring science skeletal skeleton spinal spondylophytes structures superior surface systems transverse vertebrae vertebral