Perhaps , much neurogenesis has occurred in their hippocampi .

也许，在他们的海马区存在大量的神经发生。

The hippocampi from the dim-light group had significantly fewer dendritic spines than those from the dark night group .

在昏暗灯光下的仓鼠的海马体中的树突刺明显比在黑暗灯光下的仓鼠少。

For instance , postmortem study of hippocampi from the brains of people whocommitted suicide show fewer glucocorticoid receptors comparedwith controls .

例如，与控制组比，自杀者的海马的尸检研究显示更少的肾上腺皮质激素受体。

The princeton scientists showed that after a rodent stress test , the hippocampi of running mice contained fewer proteins associated with neuron activity than the brains of sedentary mice , even though the runners had more neurons over all .

普林斯顿大学的科学家们显示经过啮齿动物的压力测试后，与久坐的老鼠的大脑相比，奔跑的老鼠的海马中含有较少与神经元活动相关的蛋白质，即使在奔跑的老鼠总体上有更多的神经元。

Control animals , with normal neurogenesis , eventually were able to bypass their hippocampi and retrieve the fear memory directly from long-term storage . But animals in which neurogenesis had been blocked still depended on the hippocampus to recall the fear memory , the researchers found .

研究者们发现，神经发生正常的对照组动物最终可以把海马体中的恐惧记忆顺利转成长期记忆，但是实验组的动物依然以来海马体中的恐惧记忆。