Contact: Jules Asher
NIH/National Institute of Mental Health
Caption: Scientists have switched a fear memory on and off in genetically-engineered rats -- using a flash of light. Optogenetic technology produced this first cause-and-effect evidence that memories are formed by strengthened connections between neurons.
Credit: Roberto Malinow, M.D., Ph.D., of the University of California, San Diego
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Related news release: Shining a light on memory