Leprince et al. use longitudinal two-photon calcium imaging to track the development of internal vs. external representations in the CA1 region of the mouse hippocampus. They identify the mid-fourth p...

Pouget et al. identified distinct CA1 neuron ensembles active during specific moments of fear learning and uncovered the core engram essential for memory formation.

How are associative memories formed? Which cells represent a memory, and when are they engaged? By visualizing and tagging cells based on their calcium influx with unparalleled temporal precision, we ...