但如果这些神经元得到了高度激活，比如在个体吸收一些新颖复杂的信息的情况下，新生神经元成活的比例会高很多，研究者认为它们这是在帮助大脑形成新的记忆。
If they are highly activated, however — such as in learning new complex information — many more of them will survive and presumably help in establishing new memories in the brain.
加州大学欧文分校的研究者们发现，一个人能回想起一件事细节的多少取决于是否大脑中某些部分被激活，将记忆进行“打包”。
Researchers at UC Irvine have found that how much detail one remembers of an event depends on whether a certain portion of the brain is activated to "package" the memory.
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