With the Flick of a Switch!

http://www.aan.com/elibrary/neurologytoday/?event=home.viewArticleGraphic&id=ovid.com:/bib/ovftdb/00132985-201107070-00006&objectID=FFU2

Karl Deisseroth, a scientist at Stanford University, has discovered a way to control brains with different colored lights. His idea of lights being able to change our lives came to him at a stoplight. He thought of it with idea that when we drive through stoplights, one part of our mind in controlled by the lights and what command they are, while the other part of our mind can be focused on something completely different at the same time. He wanted to test out this idea, so he did so with mice the basic "lab rats". First he introduced the mice to cocaine, to which they got addicted. After the mice had showed signs of euphoria associated with the cocaine he then used flashes of bright yellow light. Those flashes immediately blocked the mice's need for the high of the cocaine. After being shown the lights, the mice showed no more interest in the cocaine as they did before they were exposed to it. Deisseroth's technique is now known as optogenetics. Maybe with this knowledge that he has gave us, we can hopefully cure psychiatric diseases as well as drug addictions. The most remarkable part about all of this is that we can do these things with "the flick of a switch".
Sources: http://discovermagazine.com/2012/sep/25-controlling-brains-with-flick-of-light-switch

http://www.blogcdn.com/www.engadget.com/media/2009/10/oct2109eng-optogenetics.jpg