It appears that calendrical calculating autistic savants engage the posterior right hemisphere to solve seemingly impossible maths problems.173 Donald Treffert, who has spent his life studying savants, had by 2010 assembled a worldwide registry of 319, of whom 32 had the acquired form. In a paper in Scientific American, he reports that in most of these acquired cases, leading to exceptional mathematical, musical or artistic talents, there was damage to the left hemisphere, leading to a release phenomenon involving recruitment and rewiring in the right hemisphere (he calls this the ‘three
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