对衰老大脑的传统看法是,人们丧失神经细胞就像秃子掉头发。脑细胞被认为在大约20岁时开始减少,一切就此走下坡路。一些人很早就开始变秃或者衰老。也有一些幸运者到了90多岁仍难得地不落头发或者保持机警。来自八九十岁的健康老人的资料证明,在健康的大脑中,脑细胞的减少较为缓慢,而且大都局限于特定部位,使其他部位不受损害。事实上,在每10人中,大约有一人在八九十岁时仍能 The traditional view of the aging brain is that people lose nerve cells like bald hair loss. Brain cells are thought to begin to decline at about the age of 20, and everything goes downhill. Some people start bald or aging long ago. There are also some lucky ones who are in their 90s still rare to fall hair or be alert. Information from healthy elderly people in their 80s and 90s shows that in healthy brains, the reduction of brain cells is relatively slow, and most of them are limited to specific areas, leaving other areas intact. In fact, of every 10 people, about one in eighty or ninety years old still can