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。

Studies in mice have shown that the dentate gyrus is one of the few bits of the brain to generate new neurons even in adulthood.

对老鼠的研究表明，即使在成年后，齿状回也是大脑中少数几个会产生新神经元的部位之一。

Then evidence began to emerge of young neurons in the brains of adult rats and mice, -specifically in the olfactory bulb, which processes smell, and the dentate gyrus.

随后，成年大鼠和小鼠的大脑中出现了年轻神经元的证据，特别是在处理气味的嗅球和齿状回中。

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。

After being injected, the cells in the dentate gyrus would begin to produce channelrhodopsin-2, making the cells themselves sensitive to light as well.

注射后， 齿状回中的细胞会开始产生 channelrhodopsin-2，使细胞本身也对光敏感。