The Health Show #1212 – Have you ever done something, stopped, and then thought...why the heck do I just do that? The answer is: you didn't...apparently it's all your brain's fault. On this week's Health Show we'll talk to a psychiatric researcher about how the brain sometimes goes off on its own...and how you can regain control.

We'll also talk to tennis legend Billie Jean King and her knee surgeon about advances in knee replacement surgery. And we'll visit an island that has revitalized itself after years of housing medical outcasts.