But while the principal loading hypothesis can explain gross injuries, such as fractures in vertebrae or slipped discs, it does not explain the vast majority of cases of back pain.Link Discuss
The researchers say the spine should be considered not as a column, but as a dynamic chain of segments that can rotate. When viewed as such, it becomes clear that torque can damage the joints and muscle between and around vertebrae.
The model can reveal, for instance, whether equipment added to a soldier's helmet could result in excessive "torque jolts" - the kind of quick rotational jerks that Beagley and Ivancevic blame for spinal injuries - as the soldier performs manoeuvres.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.