The ability to distinguish between similar memories depends on a tiny strip of brain tissue called the dentate gyrus.

区分相似记忆的能力依赖于一小块被称为齿状回的脑组织。

They injected a mixture of chemicals into a part of the mice's brains involved in memory formation called the dentate gyrus.

他们将一种化学物质的混合物注入小鼠大脑中与记忆形成有关的部分，称为齿状回。