corpus callosum

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The corpus callosum, which connects the brain's left and right hemispheres and carries traffic essential to many advanced brain functions, steadily thickens.
胼胝体（连接大脑左右两半球，负责传递对高级大脑功能有重要意义的信息）在稳步增厚。
The researchers saw significantly increased activity within the corpus callosum, the area that connects the left and right brain hemispheres, in those with Tourette.
研究人员看到，在那些患有图雷特综合症的孩子的胼胝体中的活力大增，胼胝体是脑中连接左右大脑的区域。
It's as if emotion is in a little room of its own and a man's smaller corpus callosum means that emotion is less likely to operate simultane- ously with other functions.
情绪似乎呆在自己的小房间里，而男人较小的脑胼胝体意味着，他不大可能同时操纵情绪和其它功能。

Another example in addition to those you cite in your post is that the corpus callosum (fibers that connect the two hemispheres in the brain) tends to be thicker in women than in men.
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Four different studies done in the past decade using MRI (magnetic resonance imaging) all found a slight reduction in the size of four regions of the brain: the corpus callosum, the basal ganglia, the frontal lobes, and the cerebellar vermis.
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