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本文在常规脑电图的基础上运用地形图技术，对高氟区智力低下儿童的脑电活动进行了研究。结果表明智低组在中央、顶、枕及左颞区θ能量百分率明显高于正常对照组，在中央、枕区α能量百分率明显低于对照组。这些脑电异常改变与高氟环境密切相关。通过脑地形图能直观、形象地了解氟对脑功能的损害程度。
Based on the conventional electroencephalogram (EEG), this paper uses topographic technique to study the EEG activity of children with mental retardation in high fluoride area. The results show that the Chi low group in the central, apex, occipital and left temporal area θ energy percentage was significantly higher than the normal control group in the central and occipital α energy percentage was significantly lower than the control group. These abnormalities of EEG are closely related to the high fluoride environment. Through brain topography can intuitively and vividly understand the extent of damage to brain function of fluorine.