Physiotherapists in Preston 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.

Bone Metabolism

Bone, like muscle, is an adaptive tissue and bony mass and its structure changes to resist the forces which are applied to it in activity. Changes in the bone require that a large number of cells which are quite far apart join in to perform a particular activity and they do this by chemical messengers but also by long outgrowths from their cells connecting with others. How fast bones can strengthen or become weaker is not clear, although experiments have shown that a bone can increase its mineral content by 40% in six weeks if it is frequently loaded. A loss of 10-15% of bone mass can be expected if a bone is kept unloaded for eight weeks.

Cortical bone may be 35% greater in mass in the playing arm of a professional male tennis player and bone can react even more strongly as its density is very high in expert weight lifters. Sclerosis, an increase in density of vertebrae adjacent to discs which are suffering degeneration, is less beneficial a process and may impede nutritional transport through the bone. Osteophytes, bony outgrowths, may be an attempt to stabilise a joint but can also get in the way and cause nerve impingement.