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.
Causes of Lumbar Disc Syndrome. Herniation of the Nucleus Pulposus. A spinal disc herniation, sometimes called a slipped disc, is a tear in the outer, fibrous ring of an intervertebral disc that allows the soft, central portion to bulge out of place. Lumbar Radiculitis.