铅是一种存在于环境中的神经毒元素。虽然近些年来人们做了不少努力,比如限制含铅油漆的使用,降低汽油中的铅含量等等,但是环境中的铅污染依然存在,铅中毒仍然是儿童环境健康的首要问题。生长发育期的中枢神经系统对铅的毒性特别敏感。铅在大脑中引起的损害主要集中在一些特殊 Lead is a neurotoxic element that exists in the environment. Although many efforts have been made in recent years, such as limiting the use of lead paint and lowering the lead content in gasoline, the lead pollution in the environment still exists. Lead poisoning is still the primary problem for children’s environmental health. The central nervous system during growth and development is particularly sensitive to lead toxicity. Lead in the brain caused by the damage is mainly concentrated in some special