Matthäus Lars, Pham Trieu, Croft Rodney J
Institute for Robotics and Cognitive Systems, University of Lübeck, Lübeck, Germany.
Psychophysiology. 2008 Jul;45(4):569-78. doi: 10.1111/j.1469-8986.2008.00642.x. Epub 2008 May 20.
This article approaches the problem of EOG artifact correction using one EOG channel from a biophysical point of view. It shows that recordings from one EOG channel are sufficient to correct artifacts from one-dimensional eye movements not exceeding 30 degrees . We prove that the subtraction method "corrected EEG=measured EEG-backward propagation * measured EOG" yields the uncorrupted EEG trace up to scaling despite possible influences of forward propagation. Further, a special calibration paradigm (aligned artifact average, AAA) is investigated, and algorithms are presented to calculate the exact backward propagation. Experimental results from 13 subjects are shown, supporting the theoretical prediction of optimal correction.
本文从生物物理学角度探讨了使用一个眼电（EOG）通道进行EOG伪迹校正的问题。结果表明，来自一个EOG通道的记录足以校正不超过30度的一维眼球运动产生的伪迹。我们证明，尽管存在正向传播的可能影响，但减法方法“校正后的脑电图=测量的脑电图-反向传播*测量的眼电”仍能得到未受干扰的脑电图迹线，最多相差一个比例因子。此外，还研究了一种特殊的校准范式（对齐伪迹平均，AAA），并提出了计算精确反向传播的算法。展示了13名受试者的实验结果，支持了最佳校正的理论预测。
