英语语法分析

During neurogenesis and in early brain development, ectonucleotidases often downregulate purinergic signalling.

在神经发生和早期大脑发育过程中，外切核苷酸酶通常下调嘌呤能信号传导。

But the effects of neurogenesis on mood are murkier.

但神经发生对情绪的影响则不明确。

This also decreased neurogenesis in the hippocampus.

这样之后，海马体的神经形成也减少了。