Variability of EEG electrode positions and their underlying brain regions: visualising gel artifacts from a simultaneous EEG-fMRI dataset

We investigated the between-subject variability of EEG electrode placement from a simultaneously recorded EEG-fMRI dataset. Neuro-navigation software was used to localise electrode positions in xyz and MNI space, made possible by the gel artifacts present in the structural MRI images. To assess variation in the brain regions directly underneath each electrode, we used both raw MNI coordinates and labels from the Harvard-Oxford Cortical atlas.

本研究旨在探讨同时记录的脑电图-功能性磁共振成像（EEG-fMRI）数据集中，不同个体间脑电图电极放置位置的差异。借助神经导航软件，在xyz坐标系以及MNI（蒙特利尔神经学研究所）空间中对电极位置进行定位，这一过程得益于结构MRI图像中存在的凝胶伪影。为了评估每个电极下方大脑区域的变异情况，我们既使用了原始的MNI坐标，也参考了哈佛-牛津皮层图谱中的标签。