【2015高考复习】阅读理解
What happens inside the skull of a soccer player who repeatedly heads a soccer ball？That question motivated a challenging new study of the brains of experienced players that has caused discussion and debate among soccer players，and some anxiety among those of us with soccerplaying children.
For the study，researchers at the Albert Einstein College of Medicine in New York selected 34 adults，men and women.All of the volunteers had played soccer since childhood and now competed yearround in adult soccer leagues.Each filled out a detailed questionnaire developed especially for this study to determine how many times they had headed a soccer ball in the previous year，as well as whether they had experienced any known concussions (脑震荡) in the past.
Then the players completed computerized tests of their memory and other learning skills and had their brains scanned，using a complicated new MRI technique which can find structural changes in the brain that can’t be seen during most scans.
