Most people never think about the body unless something goes wrong with it. This seems to be especially common with the hand – and a certain digit in the hand, the thumb. What could possibly go wrong? But ask anybody who has injured their thumb and prepare for a laundry list of all the things that it does for you: it gives you a power grip, the ability to open jars and doorknobs. And if it’s not working properly – it can lead to a world of problems. Today we’re going to hear from Dr. Robert Markison, Clinical Professor of Surgery at the University of California San Francisco. Dr. Markison will explain why the thumb is so at risk for injuries -- and how we can protect them!