We are concerned about sparsely synchronized rhythms (SSRs), associated with diverse cognitive functions, in the hippocampal dentate gyrus. Distinctly, adult-born immature GCs (imGCs) emerge through neurogenesis, in addition to the mature granule cells (mGCs) (emerged in the developmental stage). In prior work, these mGCs and imGCs were found to exhibit their distinct roles in pattern separation and integration for encoding cortical inputs, respectively. But, the underlying dynamical mechanismremains unclear. In this paper, we first study influence of the young adult-born imGCs on emergence of SSRs in the populations of the mGCs and the imGCs; population and individual firing behaviors in the SSRs are intensively studied. We then examine how the SSRs play a role in the underlying mechanism for pattern separation and integration. Particularly, quantitative relationship between SSRs of the mGCs and the imGCs and their pattern separation and integration is investigated.

我们担心海马齿状回中与多种认知功能相关的稀疏同步节律（SSR）。明显地，除了成熟颗粒细胞 (mGC)（在发育阶段出现）之外，成年出生的未成熟 GC（imGC）还通过神经发生出现。在之前的工作中，我们发现这些 mGC 和 imGC 分别在编码皮质输入的模式分离和整合中表现出不同的作用。但是，潜在的动力机制仍不清楚。在本文中，我们首先研究了年轻成年出生的imGC对mGC和imGC群体中SSR出现的影响； SSR 中的群体和个体放电行为得到了深入研究。然后我们研究 SSR 如何在模式分离和集成的底层机制中发挥作用。特别是，研究了 mGC 和 imGC 的 SSR 之间的定量关系以及它们的模式分离和集成。