THE first comprehensive model of the human spine is challenging our assumptions about the causes of back pain. Contrary to the idea that spinal injuries are caused by a combination of compression, bending, tension and shear forces, the 3D animated model suggests many injuries are the result of quick twists of the vertebrae, making the joints between them rotate.
Nick Beagley and Vladimir Ivancevic of the Defence Science and Technology Organisation in Edinburgh, South Australia, have spent the past 18 months developing their mathematical model, called the Full Spine Simulator (FSS). Existing models of the spine evaluate forces placed on a single joint, or a simple series of joints, and allow each just a few degrees of freedom. But the FSS represents all 25 movable joints of the spine, and gives each its full six degrees of freedom.
The FSS also takes into account the presence of soft tissue, and ...
To continue reading this article, subscribe to receive access to all of newscientist.com, including 20 years of archive content.