Some of this neuroplasticity is immensely cool but tangential to free-will squabbles. If someone goes blind and learns to read braille, her brain remaps—i.e., the distribution and excitability of synapses to particular brain regions change. Result? Reading braille with her fingertips, a tactile experience, stimulates neurons in the visual cortex, as if she were reading printed text. Blindfold a volunteer for a week and his auditory projections start colonizing the snoozing visual cortex, enhancing his hearing. Learn a musical instrument and the auditory cortex remaps to devote more space to
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