Physiotherapists in Solihull treat many different conditions including the issues profiled below.

Disc Nutrition and Posture

The supply of nutritional substances to the inner parts of the discs is in general poor and a lack of this supply is connected with degenerative disc changes. Large differences in the compression forces inside an intervertebral disc can be generated by relatively small changes in posture. These changes have correspondingly large effects on fluid flow out of and into discs and on diffusion of metabolic agents into the disc. The effectiveness of the transport of these materials depends on how far they have to travel from the nearest blood vessel which is usually in the vertebral endplate (top or bottom of the disc).

When bending, the back of the disc walls is stretched and the fronts are compressed, with stretching making the wall thinner and therefore more easily crossed by nutrients. This brings more food supply into the central area of the rear of the disc, the area which receives least nutrition. Compression from movement also squeezes water from the disc and as it returns when the pressure is relieved the incoming water brings nutrients along with it. Changes from a lordosis to a flexed position regularly increase the fluid flow in and out of the disc, encouraging the transport of nutrients.

Repeated Loading of Lumbar Discs

Lower loads than the sudden compression loading which occurs seldom can cause a disc prolapse if the loading in a bent position is repeated in a cyclical manner. This can be caused in discs which are reasonably young and causes a large split in the rear of the disc wall to one side or another, allowing the central nuclear material to ooze out. In several examples the layers of the disc wall which were the most outer ones did not split and form a fissure and the nuclear material protruding through the fissure inside built up behind the remaining layers in a bulge. As the ligament overlying this has many nerve endings, such a bulge could cause pain.

Older discs were shown in some cases to have fissures which are already present before any experimental loading and these discs did not prolapse during the loading tests, perhaps because the fissures had healed or because discs in poorer condition are too stiff and fibrosed to prolapse. If twisting, side bending or compression is added to bending then prolapse can occur more easily with less bend of the back. In some cases the nucleus may protrude out but in others the outer disc walls can protrude themselves.