Myslobodsky M S, Coppola R, Weinberger D R
Clinical Brain Disorders Branch, NIMH Neuroscience Center, St. Elizabeths, Washington, DC 20032.
Brain Topogr. 1991 Spring;3(3):381-90. doi: 10.1007/BF01129641.
Bilateral EEG recording is a common practice when brain laterality needs to be assessed in cognitive neurophysiology and psychiatry research. Its precision and validity remain uncertain. With structural brain imaging methods, it is possible to examine EEG electrode placements according to the 10-20 system and the validity of inferences made on derived data. Frequent sources of placement errors are examined along with important factors that contribute to EEG imbalance. Examples are mentioned where asymmetries of EEG/ERP caused by cranial and parenchymal brain asymmetries may be mistaken for cognition-related laterality changes. Because external skull landmarks are not reliable predictors of cranial and parenchymal brain asymmetries, laterality assessment cannot be guaranteed by the 10-20 system. Consequently, a return, on a case-to-case basis, to nonstandard montages, assisted by structural brain imaging is seen as an acceptable alternative.
在认知神经生理学和精神病学研究中，当需要评估脑偏侧性时，双侧脑电图记录是一种常见的做法。其准确性和有效性仍不确定。借助结构性脑成像方法，可以根据10-20系统检查脑电图电极的放置位置以及对派生数据所做推断的有效性。文中探讨了常见的放置错误来源以及导致脑电图失衡的重要因素。文中还列举了一些例子，说明由颅骨和脑实质不对称引起的脑电图/事件相关电位不对称可能被误认为是与认知相关的偏侧性变化。由于外部颅骨标志不是颅骨和脑实质不对称的可靠预测指标，因此10-20系统无法保证偏侧性评估的准确性。因此，在结构性脑成像的辅助下，根据具体情况回归到非标准导联被视为一种可接受的替代方法。
