Through dynamic analysis of D2 and PD2 topographics maps, there might be a working circuit from both temporal lobes to C3, F7(or F3) under mental arithmetic task.

我们通过D2和PD2地形图的动态分析，认为在心算过程中可能存在从双侧颞部→C3、F7（或F3）的工作环路。

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"Mental arithmetic is a more complex and challenging task, which more than 20% of people struggle with, " the study said.

BBC: Brain stimulation promises 'long-lasting' maths boost