>>This network, whose activity is spread throughout the frontal and parietal lobes of the brain,

A (rare enough) person in chronic coma, regaining consciousness on a sedative-hypnotic drug zolpidem, which lasts for a couple of hours as long as the drug is active, can also show parietal lobes (and a bit of dorsal frontal lobes) activation (as showcased probably in Hamilton's Pharmacopoeia in a series on zolpidem).

Thus, according to modern neuroscience and brain imaging, reading code is basically the same as regaining consciousness on zolpidem while in coma.