【2015高考复习】阅读理解 What happens inside the skull of a er player who repeatedly heads a er ball?That question motivated a challenging new study of the brains of experienced players that has caused discussion and debate among er players,and some anxiety among those of us with erplaying children. For the study,researchers at the Albert Einstein College of Medicine in New York selected 34 adults,men and of the volunteers had played er since childhood and peted yearround in adult er filled out a detailed questionnaire developed especially for this study to determine how many times they had headed a er ball in the previous year,as well as whether they had experienced any known concussions (脑震荡) in the past. Then the puterized tests of their memory and other learning skills and had their brains scanned,using plicated new MRI technique which can find structural changes in the brain that can’t be seen during most scans. According to the data they presented at a Radiological Society of North America meeting last month,the researchers found that the players who had headed the ball more than about 1,100 times in the previous 12 months showed significant loss of white matter in parts of their brains involved with memory,attention and the processing of visual pared with players who had headed the ball fewer times. This pattern of white matter loss is “similar to tho
