[Eeglablist] determine the origin of the coordinates of the electrode positions.

[xian zhang]

Dear EEG List:
We acquired the xyz coordinates of the electrodes in T1 image space.
I wonder how to translate those into standard electrode coordinate.
In other words,  how to determine the origin and axes from the T1 image.
Are the origin and axes fixed in MNI space? Or are they fixed for
specific anatomic land marks?
Xian