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The discs have a tough outer covering of cartilage that provides support (the annulus fibrosus) and a soft, jellylike center that provides the cushioning (the nucleus pulposus). The intervertebral discs have the following functions: They provide cushioning for the vertebrae and reduce the stress caused by impact. By keeping the vertebrae separated from each other, they act as a type of shock absorber for the spine.
Intervertebral Discs-Overview. The cervical spine includes the first seven vertebrae forming the spinal column. In between the vertebrae are intervertebral discs which act as shock-absorbers to cushion the vertebral bodies but also allow for flexibility of movement in the cervical spine.here are twenty-three intervertebral discs in the spine and ,as there is more rotation, extension, and flexion in the neck than in the other portions of the spine, the cervical intervertebral discs are subject to more stress and pressure than lower discs.