We are learning to exploit the amazing plasticity of the brain

摘要

As a physician, I am concerned with people who have neurological damage or disease or who are, in general, trying to improve their neurological function. Something that has intrigued me recently is how, after one has lost one's eyesight, the mind's eye-the brain's ability to create visual images-not only persists but canrnbe heightened and harnessed. A lot of people who lose their sight are still visual people. As they read braille with their fingertips, they may experience it visually. This is not just a metaphor or a manner of speaking; functional imagery of their visual cortex shows that it is activated as they read braille. It's a cross-modal transfer, so thatrntouch is converted into visual experience in the brain.