Science today isn't the same as the science 2000 years ago was but some principles remain the same. The human knowledge constantly grows but with more knowledge there comes even more mysteries and unsolved questions, so science is always going forward.
Causes. The most common cause of a cervical herniated nucleus pulposus is gradual degeneration of the disc, attenuation (weakening) of the posterior annulus fibrosis, and subsequent protrusion of the nucleus pulposus into the spinal canal causing compression of the nerve root.
Due to the gradual deterioration of these discs over time as part of the natural aging process, these discs can develop a tear and the nucleus pulposus may push through the disc wall and extrude into the spinal canal â a condition known as a herniated nucleus pulposus.