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.
A herniated disc â also called a slipped disc or ruptured disc â occurs when pressure from the vertebrae above and below force some or all of the nucleus pulposus through a weakened or torn part of the annulus. The herniated nucleus pulposus can press on the nerves near the disc, resulting in pain. Herniated discs most frequently occur in the lower part of the spine; however they can also occur in the cervical and thoracic spine. A herniated disc is one of the most common causes of neck, back and/or leg pain and neckache