We traveled along Highway What, and by cloning ourselves traveled along Highway Do at the same time. Highway What has disgorged us into the start of the enigmatic prefrontal region of the cortex, the front third of your cortex, roughly everything forward of your ears. Highway Do left us in part of the parietal regions of cortex, a large strip above and behind your ears (figure 7.5). It becomes harder now to know precisely what any particular small bit of these regions of cortex do. And their roles are intertwined. Neurons in both prefrontal and parietal regions send axons to the other, so we
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