Watch this video showing a surgical procedure that can straighten a senior's spine on HowStuffWorks. More than 1.4 million people in the U.S. suffer from lumbar spinal stenosis, where the bones in the spinal chord pinch nerves when you bend or move; it's very painful and severely limits mobility, usually in seniors. See how a new non-invasive surgery can ease the pain and increase mobility in this video from MultiVu.