Walking more than 72 blocks did not appear to increase gray matter volume any further.

步行超过72街区的人们看来没有再增加脑灰质容量。

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That may be why people with less gray matter volume in these areas are more sensitive to pain, and vice versa, the researchers said.

研究人员表示，这可能就是在上述脑区灰质较少的人对疼痛更为敏感的原因。

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The significance of the relatively smaller gray matter volume and density seen in these players is not yet clear, the researchers say.

在这些运动员大脑中观察到的相对小的灰质面积和密度所代表的意义尚不清楚，研究者们说。

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And they found a noticeable increase in gray matter volume in the regions known to be related to color vision and perception.

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" And that both of these features are well predicted by the volume of gray matter in two specific regions of the prefrontal cortex, regions that are known to be important in "decoupling the perspectives of other people from one's own.

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