Somsen R J, van Beek B
Department of Developmental Psychology, University of Amsterdam, The Netherlands.
Biol Psychol. 1998 Aug;48(3):281-300. doi: 10.1016/s0301-0511(98)00041-6.
The electroencephalogram (EEG) during middle childhood may be highly distorted by the occurrence of eye and head movement artifacts. Between 5 and 12 years children display a great number of such artifacts. In the present study we studied different methods to assess EEG artifacts in children. Three artifact treatments were compared with the uncorrected EEG: one widely used method which corrected the EEG for electrooculogram (EOG) EEG transfer and two methods which selected artifact-free EEG segments. The most effective method should selectively reduce the spectral power in the lower frequency bands and at the frontal regions which are most susceptible to eye artifacts. The results demonstrated that the selection procedure, which combined two criteria for the selection of artifact-free EEG segments, was superior. The procedure that corrected the EEG for EOG-EEG transfer unselectively removed spectral power across the whole scalp and across all frequency bands. Furthermore, part of the maturational change in frontal Alpha power was filtered out by the correction procedure. It was concluded that for the background EEG in children, it is better to carefully select artifact-free EEG segments than to correct for EOG-EEG transfer.
童年中期的脑电图（EEG）可能会因眼睛和头部运动伪迹的出现而严重失真。5至12岁的儿童会出现大量此类伪迹。在本研究中，我们研究了评估儿童脑电图伪迹的不同方法。将三种伪迹处理方法与未校正的脑电图进行了比较：一种广泛使用的方法是根据眼电图（EOG）脑电图传递对脑电图进行校正，另外两种方法是选择无伪迹的脑电图片段。最有效的方法应选择性地降低低频带和最易受眼部伪迹影响的额叶区域的频谱功率。结果表明，结合两种选择无伪迹脑电图片段标准的选择程序更具优势。根据EOG-脑电图传递对脑电图进行校正的程序会无选择地去除整个头皮和所有频段的频谱功率。此外，额叶阿尔法功率的部分成熟变化被校正程序滤除。得出的结论是，对于儿童的背景脑电图，仔细选择无伪迹的脑电图片段比根据EOG-脑电图传递进行校正更好。
