東ドイツの極右勢力の話なんかするより、これだよね。外国語を学ぶと脳がパワーアップするだとよ。洒落? いやいや、ネイチャー誌の最新号に掲載されている"Neurolinguistics: Structural plasticity in the bilingual brain"(冒頭・参照)の話。 Humans have a unique ability to learn more than one language -- a skill that is thought to be mediated by functional (rather than structural) plastic changes in the brain. Here we show that learning a second language increases the density of grey matte