A knife in back surgery
Every year, half a million Americans undergo surgery for low back problems alone, at a cost of more than US$11 billion. For the most part, the surgeries are for herniated (or slipped) discs, where a disc tears, some of its gelatinous insides come out, and the disc starts to bulge. The other major condition landing people at the surgeon’s door is spinal stenosis, caused by slipped discs or arthritis. In this case, the spinal canal begins to narrow, pinching the spinal cord or the nerves branching off to various parts of the body, and causing pain, tingling or numbness in your arms or legs, depending where the pinch occurs on the spine. With our sedentary lives, pinched nerves affect more than 10 percent of the population, particularly those over 50. The most common procedure…