The first is they're topographical

首先它们是具有地形学特点的
and what this means is that

这意味着
if two parts of the— two parts are close together on the body,

如果身体上的两个部位是紧挨着的话
they'll be close together on the brain.

那它们在大脑中对应的区域也是紧挨着的
So, your tongue is closer to your jaw

所以相对于屁股
than it is to your hip in the body;

你的下巴在身体上距离你的舌头更近
so too in both the motor cortex

而在运动皮层与感觉皮层上的位置
and the somatosensory cortex.

也是这样对应着的
Also, you'll notice that

而且你会发现
the size of the body part represented in the brain

身体部位在大脑中对应的皮层面积大小
does not correspond to the size of the body part in the real world.

与身体部位的实际大小并不一致
Rather, what determines the size in the brain

相反对运动的控制程度