Off Switch for Pain? Chemists Build Light-Controlled Neural Inhibitor
"ScienceDaily (Feb. 22, 2012) - Pain? Just turn it off! It may sound like science fiction, but researchers based in Munich, Berkeley and Bordeaux have now succeeded in inhibiting pain-sensitive neurons on demand, in the laboratory. The crucial element in their strategy is a chemical sensor that acts as a light-sensitive switch."
http://www.sciencedaily.com/releases/2012/02/120222093506.htm