by Kirstin Weible, PT, ScD, COMT What’s with my disc? Between each vertebra lies an intervertebral disc. It is made of many layers of outer tissue similar to what a ligament is made of, called the annulus fibrosus, and a softer gel-like center, called the nucleus pulposus. Behind the disc is a space called the intervertebral foramen (“foramen” means “hole” …