Rather, what determines the size in the brain is the extent to which either they have motor command over it or sensory control.
相反，对运动的控制程度，或是对感觉的控制程度，决定了身体部位在大脑中对应区域的大小。
These neurons will fire when a person performs a specific action. For example, if I do that, and reach and grab an apple, a motor command neuron in the front of my brain will fire.
当人们做某种动作时这组神经元会发射讯号，例如，如果我这麽做，伸手抓住一颗苹果，一个位于我大脑前方的运动神经元就会发射讯号；
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