Litvak Vladimir, Friston Karl
The Wellcome Trust Centre for Neuroimaging, University College London, UK.
Neuroimage. 2008 Oct 1;42(4):1490-8. doi: 10.1016/j.neuroimage.2008.06.022. Epub 2008 Jun 27.
The aim of this paper is to describe a simple procedure for electromagnetic (EEG or MEG) source reconstruction, in the context of group studies. This entails a simple extension of existing source reconstruction techniques based upon the inversion of hierarchical models. The extension ensures that evoked or induced responses are reconstructed in the same subset of sources, over subjects. Effectively, the procedure aligns the deployment of reconstructed activity over subjects and increases, substantially, the detection of differences between evoked or induced responses at the group or between-subject level.
本文的目的是描述一种在群体研究背景下进行电磁（脑电图或脑磁图）源重建的简单程序。这需要对基于层次模型反演的现有源重建技术进行简单扩展。该扩展确保在不同受试者的同一源子集中重建诱发或诱导反应。实际上，该程序使不同受试者之间重建活动的分布对齐，并显著提高了在群体或受试者间水平上检测诱发或诱导反应之间差异的能力。
