11. In between each pair of vertebrae are two small holes called intervertebral foramina. 12. The pathophysiology of intervertebral disc injury after spaceflight has not been clearly identified. 13. Nearly 95 percent of disc herniations occur at the lowest two lumbar intervertebral levels. 14. The infection then spreads from two adjacent vertebrae into the adjoining intervertebral disc space. 15. Cushing may have had a ruptured intervertebral disc. 16. The plexus is formed lateral to the intervertebral foramina and passes through psoas major. 17. Often on a single nerve root, the cause is a herniated intervertebral disc. 18. In the spine, similar fibres join the intervertebral disc to the adjacent vertebrae. 19. The natural evolution of disc disease and degeneration leads to stiffening of the intervertebral joint. 20. In the first form, called intervertebral autotomy, the tail breaks between the vertebrae.
