Scientists turn memories off and on with flip of switch

Scientists have developed a way to turn memories on and off -- literally with the flip of a switch. Using an electronic system that duplicates the neural signals associated with learning, they replicated the brain function in rats associated with long-term learned behavior, even when the rats had been drugged to forget. "Flip the switch on, and the rats remember. Flip it off, and the rats forget," said the leader of the team reporting the result.

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