Link Search Menu Expand Document

EEGLAB and MEG data

EEGLAB supports reading most MEG data formats through the File-IO module. Therefore all the major manufacturers may be imported (CTF, Neuromag, Neuroimaging 4-D, BTi). There is also the native ctfimport EEGLAB plugin to import CTF data.

The BIDS-matlab-tools EEGLAB plugin also support importing BIDS formated MEG data. You may install this plugin from the EEGLAB plugin manager (menu item File > Manage EEGLAB extensions).

MEG data may be processed as EEG data, although there is added complexity for some data formats. For example, EEGLAB does not differentiate between gradiometers and magnetometers for Neuromag data. For plotting purposes, you should only keep one type of data.

Also, EEGLAB does not support MEG gradient correction, which is a required step after importing MEG data, so you need to do that outside of EEGLAB before processing the MEG data in EEGLAB.

For MEG source localization, you can use a custom model in DIPFIT within EEGLAB (there is a specific entry for MEG custom leadfield matrix as explained here). EEGLAB is still a solution of choice if you are using Independent Component Analysis to extract brain sources from MEG data.

However, EEGLAB is not primarily designed to process MEG data and perform MEG source localization. For advanced MEG source processing that does not involve ICA, a large number of MEG users directly use specialized MEG software. For MEG source localization, some of the most popular tools include Fieldtrip, Brainstorm, MEG-tools, MEGSIM, NUTMEG, OpenMEG, MNE suite, or Curry. Some of the links on the popular NITRC platform are listed shown