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Another group does it directly from fMRI: http://www.ncbi.nlm.nih.gov/pubmed/20460157

Among the caveats: really high-T magnet, not feasible for general use; the visual stimulus was actually a warped version that would be reproduced as the nicely shaped activation upon retinotopic projection (it's a log-polar mapping)... Still really cool.

(ps: no-paywall version here: surfer.nmr.mgh.harvard.edu)



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