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Light found in cocaine addiction tunnel

Lasers that stimulate targeted neurons ease drug compulsion in rats

Rats that will go to great lengths to get a cocaine fix might blame a group of sluggish neurons. Controlling the problem may come down to a flick of a light switch: Stimulating those brain cells with lasers reduces the addicted rats’ cocaine use, researchers report in the April 4 Nature.

“It's an outstanding piece of work,” says neuroscientist A.J. Robison of Michigan State University, who wasn’t involved in the study. The findings could help researchers better understand the role of neural circuitry in drug addiction in humans, he says.

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