Grey matter consists of cell bodies.

灰质由神经元胞体构成。

Now, the spinal cord is composed of both grey and white matter.

脊髓由灰质和白质共同组成。

Shrinking sounds bad though: why would you want less grey matter?

虽然脑部萎缩听起来很糟糕，不过为什么你希望灰质减少？

Surrounding the grey matter is white matter, which consists of the myelinated axons of various neurons.

灰质周围的是白质，由有髓鞘的神经元轴突构成。

This thin layer of grey matter covers the entire cerebrum, with different areas processing information from each of our senses.

这层薄薄的灰质覆盖整个大脑，不同的区域负责处理来自各个感官的信息。

There are other ways to stimulate the old grey matter.

还有其他方法可以刺激旧灰质。

Scientists have also found that people with Bipolar Disorder have reduced grey matter in various parts of their brains.

科学家还发现，双相情感障碍患者大脑各个部位的灰质减少。

For example, a study found that taxicab drivers developed more grey matter in their brains to help them navigate more effectively in large cities.

例如，一项研究发现，出租车司机的大脑中有更多的灰质，帮助他们在大城市更有效地导航。

More research needs to be done - but scientist Professor Colin Blakemore from Oxford University says that grey matter can change shape in the brain.

虽然还需要做更多的研究，但牛津大学的科学家科林·布莱克莫尔教授表示，灰质可以改变大脑的形状。

If you try and learn a language, regardless of your age, synaptic connections are made, which ultimately create a denser grey matter and stronger white matter networks.

如果你试着学习一门语言，不管你的年龄如何，（你大脑的）突触连接就会建立起来，最终形成一个更密集的灰质和更强大的白质网络。