The purpose of the present theoretical study was to examine the spatial resolution of electroencephalography (EEG) by means of the accuracy of the inverse cortical EEG solution. The study focused on effect of the amount of measurement noise and the number of electrodes on the spatial resolution with different resistivity ratios for the scalp, skull and brain. The results show that if the relative skull resistivity is lower than earlier believed, the spatial resolution of different electrode systems is less sensitive to the measurement noise. Furthermore, there is then also greater advantage to be obtained with high-resolution EEG at realistic noise levels.

译文

本理论研究的目的是通过逆皮质脑电图解决方案的准确性来检查脑电图 (EEG) 的空间分辨率。研究的重点是测量噪声的量和电极的数量对头皮,头骨和大脑的电阻率比不同的空间分辨率的影响。结果表明,如果相对颅骨电阻率低于先前认为的水平,则不同电极系统的空间分辨率对测量噪声的敏感性较低。此外,在现实的噪声水平下,高分辨率EEG还可以获得更大的优势。

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