The images show us these different effects in unambiguous form. If the latter are inhibited or disabled, the result is chaos. If the former regions are affected by lesions or dysfunctions of any kind - strokes, tumors - quite a lot of what we regard as normal perception survives. Some regions of the brain focus on “granular” questions, the exact representation and configuration of detailed local perceptions, while others enable the mapping of such perceptions in complex mutual relations, both in time and space. ON PAGE 99 of the first of two overwhelmingly detailed and sophisticated volumes published in November 2021 under the title The Matter with Things: Our Brains, Our Delusions, and the Unmaking of the World, you will find a couple of visual images that indicate, more vividly than any verbal summary, the foundational problem that their author, Iain McGilchrist, sets out to address.
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