The phrase "Bulging" when referring to a disc is somewhat misleading and a bit of a misnomer. ALL discs bulge... that's what they're designed to do under pressure. It's to what extent/degree that these other terminologies come into play... "Protrusion, prolapse/herniation, sequestered" are all varying degrees of disc problems.
A herniation involves a tearing of the disc fibers.
now I find it on another website and it says this:
Disc Protrusion
Commonly called a disc bulge, a disc protrusion occurs with the spinal disc and the associated ligaments remain in tact, but form an outpouching that can press against the nerves.
So, at this point, I apologize, I am not sure if it's a "bulge" or a "herniation". Dr.'s???
A protrusion and a herniation are the same:
Herniation: Abnormal protrusion of tissue through an opening. For example, a intervertebral disk (one situated between the vertebral bodies) can protrude and impinge on a nerve root. Hope this helps.
Sandra
Probably a reference to the disc between C6-C7.