Importing Electrode Locations in Combined EEG/MEG Measurements with the Neuromag System
From BESA® Wiki
The Neuromag system does not store the electrode names with the coordinates. Thus, it is extremely important that you keep track of the digitization protocol, and provide a file which provides the names of fiducials, electrodes, and additional head surface points in the order of digitization (see BESA help: Working with Electrodes and Surface Locations).
