Here's a blurb from the paper that partially answers your question:
> Late-born neurons were preferentially recruited for retrieval at short latency after acquisition, whereas early-born neurons were preferentially recruited at later times. These divergent trajectories recapitulated reactivation dynamics recorded through longitudinal calcium imaging experiments, which further revealed distinct network-wide responses between subpopulations.
The actual paper goes into more detail: https://www.science.org/doi/10.1126/science.adk0997
Here's a blurb from the paper that partially answers your question:
> Late-born neurons were preferentially recruited for retrieval at short latency after acquisition, whereas early-born neurons were preferentially recruited at later times. These divergent trajectories recapitulated reactivation dynamics recorded through longitudinal calcium imaging experiments, which further revealed distinct network-wide responses between subpopulations.