He blindfolded people for five days, then mapped their brains with TMS. He found that when he blocked out all light—the road “block” had to be impermeable—the subjects’ “visual” cortices began to process the sense of touch coming from their hands, like blind patients learning Braille. What was most astounding, however, was that the brain reorganized itself in just a few days. With brain scans Pascual-Leone showed that it could take as few as two days for the “visual” cortex to begin processing tactile and auditory signals. (As well, many of the blindfolded subjects reported that as they moved,
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