Brain, heal thyself

摘要

For decades, neuroscientists laboured under the notion that the brain—our most precious organ, which defines our mind and controls our every move—is utterly incapable of healing itself.rnThen, a few years ago, the picture changed: we do produce new neurons, researchers found. But this only seemed to be happening in paltry numbers in a few small areas of the brain, so no one was ripping up the textbooks.