Light to Inactivate and Reactivate Memory

Scientists have inactivated and then reactivated a memory in genetically engineered rats, using a flash of light. The study, supported by the National Institutes of Health, is the first cause-and-effect evidence that strengthened connections between neurons are the stuff of memory. "Our results add to mounting evidence that the brain represents a memory by forming assemblies of neurons with strengthened connections, or synapses, explained Roberto Malinow, M.D., ...