What causes Spinal “Instability”?
Spinal Instability is a term coined to describe abnormal movement between one vertebra and another. As a disc degenerates it loses tension or ‘turgor’ which allows the disc to bulge and permits increasing movements to take place between the vertebrae. The loss of disc height causes the facet joints to displace and override beyond their correct congruent alignment. This overriding and abnormal slipping of the facet joints induces arthritic overgrowth of the joints and the production of bone spurs around the joint margins.