The loss of disc hydration has apparent effects on spinal mobility.
Spinal mobility involves movement of the motion segment.
The motion segments and their biomechanical relationship to one another is discussed. The motion segments include the intervertebral disc, the ligamentum flavum, the articular facets and spinous ligaments. This essay examines spinal mobility which intricately involves movement of the motion segment and the loss of normal movement of the motion segment resulting from the loss of disc hydration. Kapandji offers a classification of the motion segment. According to Kapandji, the anterior pillar consisting of the vertebral bodies is essentially a supporting structure and plays a static role in the motion segment.