儿童注意力缺陷多动障碍（以下简称多动症）常伴有学习困难。近几年，国内外对此多从临床、神经心理、药物治疗、流行病学等方面研究。为了进一步了解微量元素与多动症的关系，本文从临床和实验相结合的角度采用病例对照方法进行了研究。1对＠和方法1．l对象病例组为1997年3月 Children with attention deficit hyperactivity disorder (ADHD) often accompanied by learning difficulties. In recent years, many researchers at home and abroad from the clinical, neuropsychological, drug treatment, epidemiology and other aspects. In order to further understand the relationship between trace elements and ADHD, this article from the clinical and experimental point of view using the case-control method were studied. 1 pair @ and method 1. l The target case group was March 1997