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在10岁儿童中,估计约10%出现诵读困难。通过对毛发中无机物含量的测定发现,在记忆受损与行为障碍的儿童毛发中,毒性金属含量较高,特别是铜、铅和镉。尽管动物实验证明,锌对脑发育及脑功能是最重要的,但在临床实践中,对锌缺乏程度及其严重性还有争议,因在常规检验中尚未找到一种简便可靠而又灵敏的实验方法。缺锌时,汗中锌的浓度降低,这比毛发或血清锌的浓度更能准确反映临床缺锌的程度。为此,本文作者对诵读困难儿童与对照组儿童汗与毛发中无机物的含量作一比较性研究。
In 10-year-olds, it is estimated that about 10% of dyslexia occurs. The determination of mineral content in hair found that toxic metals were particularly high in children’s hair with memory impairments and behavioral disorders, especially copper, lead and cadmium. Although animal experiments show that zinc is most important for brain development and brain function, the extent and severity of zinc deficiency are still debated in clinical practice because of the lack of a simple, reliable and sensitive routine test experimental method. Zinc deficiency, the concentration of zinc in sweat decreased, which is more accurate than the concentration of zinc or serum zinc to reflect the degree of clinical zinc deficiency. To this end, the author of this study of dyslexic children and control children sweat and hair of inorganic substances for a comparative study.