In mice, two fear-associated memories that are created close in time are represented in the brain's amygdala by the activation of overlapping ensembles of neurons. As a result, eliminating the fear of one memory also extinguishes fear of the other.
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Eichenbaum, H. Memories linked within a window of time. Nature 536, 405–406 (2016). https://doi.org/10.1038/536405a
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DOI: https://doi.org/10.1038/536405a
