While the dentate gyrus contains the fascia dentata and the hilus, the CA is anatomically and functionally differentiated into distinct subfields named CA1, CA2, CA3, and CA4. The CA3 region has attracted major attention in recent years for its specific role in memory processes, susceptibility to seizures and neuro-degeneration.

2021年5月20日 · These data suggest that in a novel environment, CA1 instantly forms a well-organized map, whereas CA3 forms a map gradually with experience.

CA3在解剖学上可以细分为3部分，但它们共同地都接受来自DG发来的苔藓纤维输入，通过 Schaffer氏侧支 传至CA1，通过连合纤维传到对侧的海马，通过海马伞和联合前穹隆传到外侧隔核（septalnuclei）。除外来自DG的投射，CA3也接受来自前穿质通路的直接纤维传入 ...

2023年9月26日 · Here, we show that optogenetic activation of 4-week-old (young) aGCs in free-foraging mice produces a non-reversible reconfiguration of spatial maps in proximal CA3 while rarely evoking neural activity.

2024年10月24日 · CA3 inputs are represented by a set of 1000 gaussian functions (ampl = 1; SD = 0.5 s) whose midpoints were 10 ms apart. These functions are meant to mimic a sequence of tuned inputs moving in time from 0 to 10 s. Eligibility traces (ET) are convolutions of each of the gaussian inputs with an exponential function (τ = 0.67 s).

2024年5月9日 · 海马中有三个关键结构：齿状回（dg）、海马ca3区（ca3）和海马ca1区（ca1），以及海马下托（sub）。它们之间的关系如下：

2004年8月27日 · We examined the function of this structural differentiation by determining how cell ensembles in rat CA3 and CA1 generate representations of rooms with common spatial elements. In CA3, distinct subsets of pyramidal cells were activated in each room, regardless of the similarity of the testing enclosure.

2005年10月20日 · In particular, it has been suggested that memories are stored in area CA3 of the hippocampus (Treves and Rolls, 1994). CA3 is a region characterized by the heavy recurrent connectivity, which is a crucial ingredient of the attractor networks.

海马ca3区域：记忆的存储中心. 在我们的大脑中，有一个被称为海马的区域，它是学习和记忆的关键部位。特别是海马中的ca3区域，它负责存储和处理信息，是联想记忆的核心。

ca2在位置上介于ca1和ca3之间，但功能上不同于后二者，目前研究还比较少，很少有研究专门提到。理论上，能辨识出ca2区，ca1和ca3的界限就明确了，但有时ca2的排列并不像图谱所标示的那样“凹”进去一些，所以就需要经验了。