Gero Miesenboeck reengineers a brain | Video on TED.com

Gero Miesenboeck reengineers a brain | Video on TED.com: "In the quest to map the brain, many scientists have attempted the incredibly daunting task of recording the activity of each neuron. Gero Miesenboeck works backward -- manipulating specific neurons to figure out exactly what they do, through a series of stunning experiments that reengineer the way fruit flies percieve light."