Imagine the brain could reboot, updating its damaged cells with new, improved units. That may sound like science fiction — but it's a potential reality scientists are investigating right now. Ralitsa Petrova details the science behind neurogenesis and explains how we might harness it to reverse diseases like Alzheimer's and Parkinson's. [Directe...

View full lesson: http://ed.ted.com/lessons/could-your-... Imagine the brain could reboot, updating its damaged cells with new, improved units. That may sound like science fiction, but it is a potential reality scientists are investigating right now. Ralitsa Petrova details the science behind neurogenesis and explains how we might harness it to...