Understanding the Spinal Column’s Structure
When it comes to the structure of the spinal column, it can be divided into two categories: kyphotic and lordotic. The kyphotic curves refer to the backward curves, forming the lower part of the ‘S’, which naturally occur in the thoracic and sacral regions. On the other hand, the cervical and lumbar regions have a natural curve in the opposite direction. This unique design plays a crucial role in distributing the stress experienced during both active and inactive periods.
Understanding the Intervertebral Discs
The intervertebral discs play a crucial role in the spinal column, making up about 25 percent of its length. Acting as shock absorbers, these discs consist of annulus fibrosus and nucleus pulposus, which provide cushioning and support to the spine.
The annulus fibrosus is composed of collagen fibers arranged in sheets called lamellae. It surrounds the nucleus pulposus, a gel-like substance containing water and proteoglycans – a combination of proteins and amino sugars. Together, these components work harmoniously to resist compression stress and maintain rotational stability in the spine.