常常听到某些老年人,甚至是中年人这样感叹:“老了,脑子不管用了。”的确。人到一定的年龄,智力发展就会停止,这是因为随着年龄的增长,神经细胞开始萎缩,数目减少,脑重量减轻。由于脑细胞衰亡,细胞间突触联系和蕴藏的生化物质减少,接受和传递信息的能力降低,因而造成了老年性智力减退,使老年人感觉迟钝、反应缓慢、记忆力下降。因此,保护大脑的正常功能,维持更多的神经细胞生存。对推迟和 Often hear some older people, even middle-aged people lament: “old, brain no use.” Indeed. To a certain age, mental development will cease, because as timegoes, nerve cells begin to shrink, the number decreases, and brain weight decreases. Due to the decline of brain cells, the synaptic connections among cells and the reduction of biochemical substances in the cells, the lower ability to receive and transmit information, resulting in senile mental retardation, senile senility, slow response and memory loss. Therefore, to protect the normal function of the brain to maintain more nerve cell survival. To postpone and