Brain cells making choices: pizza, or pasta?

If you've ever wondered what's going on in your brain when choosing what you want for lunch, look no further. Researchers from Washington University School of Medicine in St Louis recently published a paper in the journal Nature where they used a neat experimental trick to show what was happening in the brains of monkeys as they chose which tasty beverage they wanted to drink. Eva Higginbotham spoke with lead scientist on the project, Camillo Padoa-Schioppa, about how it works...