The spinal column, or backbone, stretches from the base of the skull to the bottom of the buttocks. It consists of more than 30 seperate bones called vertebrae. The vertebrae are linked by strong ligaments, and flexible, flattened discs lie between them. Each disc is constructed of a tough, fibrous outer covering wrapped around a jelly-like inner substance, and this construction provides enough elasticity to permit some movement over the entire spinal column.It is partly the restrictions imposed by this limited flexibility that are responsible for most back pain.If you twist the wrong way overstrain one link of the chain, it can have a painful effect on the backbone itself, and on the muscles and ligaments that tie the verebrae together.
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