Click on the image or the + sign to view larger image		Brain showing the visual cortex The visual cortex is highlighted in this brain image created using functional magnetic resonance imaging. The surface of the brain has been expanded so the parts that are normally hidden away down the folds are 'blown out' and are shown as darker areas. The visual cortex is the part of the brain that is active when you look at something. Credit: Mark Lythgoe and Chloe Hutton