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. (Recorded at TEDGlobal 2010, July 2010 in Oxford, England. Duration: 17:35)
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