View full lesson: http://ed.ted.com/lessons/diagnosing-a-zombie-tim-verstynen-brad-voytek Zombies eat brains. They are also, like all of us, driven by brain functions. What is happening in their brains to make them act as they do? In this intriguing dialogue, Tim Verstynen & Brad Voytek apply the various human medical possibilities that make zombies…zombies.