Abstract
The hippocampus provides the brain’s memory system with a subset of neurons holding a map-like representation of each environment experienced. We found in mice that optogenetic-silencing those neurons active in an environment unmasked a subset of quiet neurons, enabling the emergence of an alternative map. This intervention applied in a cocaine-paired environment neutralized an otherwise long-lasting drug-place preference, showing that recoding a spatial memory engram can alleviate associated maladaptive behavior.
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