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.
Only when the nucleus pulposus impinges on a nearby nerve or the spinal cord do symptoms arise. In fact, itâs entirely possible you have one or more herniated discs at various levels of your spine at this very moment, but they simply donât cause any problems unless this nerve compression is present.