Organisation of language in the brain: does it matter what language you speak?

AbstractBrain disease or injury is a terrible thing, but the fact that the same kinds of brain diseases occur the world over offers researchers the opportunity to address the question posed by the title to this review. In the research described here, we assessed the reading skills of adult neurological patients (who had been normal speakers and readers prior to the onset of their brain damage) in both England and Japan. We chose patients in the two countries with the same causes and neuroanatomical locations of brain damage. The writing systems of English and Japanese differ fundamentally in the manner in which written words represent the sounds and meanings of the words in their respective languages. If the organisation of language in a person's brain is determined by the characteristics of the language he or she has learned, it follows that there should be little or no commonality in the patterns of reading deficit across these two languages. On the other hand, if the same principles of brain organisati...