一、老年脑及其循环老年人各个脏器的重量均有所减少,但心脏例外,往往由于心肌肥厚其重量反而增加。据报道,其他脏器如肝脏的重量,老年人比年轻人约轻一半。从性别上看,男性60岁到80岁平均减少4.8%,女性则减少6.7%。一般说来,老年人脑重量减少率比其他脏器(心脏除外)小。其原因可能是作为高级中枢的脑,必须把其老化与萎缩程度减少到最小,以符合脑 First, the elderly brain and the circulation of the elderly have reduced the weight of various organs, but the exception of the heart, often due to myocardial hypertrophy its weight but increased. It is reported that other organs such as the weight of the liver, the elderly are about half lighter than the young. In terms of gender, the average number of males between the ages of 60 and 80 decreased by 4.8% and that of females by 6.7%. In general, the rate of brain weight loss in the elderly is less than in other organs (excluding the heart). The reason may be that as a high-level brain, it is necessary to minimize the degree of aging and atrophy in order to meet the brain