- M

On Mon, Nov 22, 2010 at 5:35 PM, Vladimir Litvak <[log in to unmask]> wrote:

Dear Muhammad,

You can find SPM's default channel locations in ASCII files with *.sfp
extension located in EEGtemplates subdirectory of SPM. I'm not sure
what locs format is but my guess is that if it is cartesian then it
should be quite similar to .sfp . However, it can also be something in
polar coordinates and then there is no simple way in SPM to convert to
that, but there is in EEGLAB.

Best,

Vladimir

On Mon, Nov 22, 2010 at 9:19 PM, MP <[log in to unmask]> wrote:
> Hello all,
> I am analyzing ERP data with SPM8 and now I'd like to perform ICA on the
> ERPs. In order to do ICA (done by EEGIFT) I need the channel location file
> in .locs format. I do not digitize electrode positions for each subject,
> therefore I don't have these channel location file. However, I see that SPM8
> does a really good job in realizing channel position, which I see when I
> press the "show sensors 3D positions" button, on the display. Is it possible
> for me to export the sensor location from here into .locs file? Or, is there
> any other way of getting this file? I am using Neuroscan SynAmps2 system
> with 64 channel cap.
> Thanks
> - Muhammad