Abstract

Roy and colleagues (Nature Communications, 13.1, 1-16, 2022) examined neuronal ensembles associated with contextual fear conditioning memory across multiple brain regions, referred to as a unified engram complex. Their four-step approach incorporating brain-wide mapping of activated neurons, engram indexing, and optogenetic and chemogenetic manipulations could offer a novel, holistic approach to implement in our continued search for the engram.

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