The parieto-temporal region, just behind the ear, and the inferior frontal gyrus, at the front, slowly analyze words.

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The goal is to amass a consistent set of data across a broad geographic region and sense it periodically to develop temporal data sets.

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Scanning their brains using functional magnetic resonance imaging, the scientists found that a region involved in language processing - the temporal lobe, part of the prefrontal cortex - was activated during verbal learning in rested patients.

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Scans also show that the temporal lobe, which contains the hippocampus, and another brain region called the posterior cingulate use less glucose than a normal brain, suggesting they have shut down.

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