[FieldTrip] QuikCap 128 NSL layout

[Andre Cravo]

Hello,

I am collecting EEG data from a SynAmps RT 128 channels. I am using a
QuikCap NSL, which although has 128 electrodes, does not follow standard
10-20 localisation.

I'm trying to create a layout to visualise my data using the template
fiducials of the cap. My script currently looks something like this:

cfg =[];
cfg.elecfile='QuikCap_128_NSL.sfp'
cfg.rotate=0;
cfg.projection='polar'
lay=ft_prepare_layout(cfg);
ft_layoutplot(cfg)

However, the electrodes seems to be shifted towards the back of the head.
The layout I get can be seen in the FieldTrip_Layout figure attached. I have
tried to realign the electrodes (using ft_electroderealign), but I get
similar results.

Has anyone ever had a similar problem?

Please find attached the 'QuikCap_128_NSL.sfp' file with the fiducials and a
.png figure of the electrode positions taken from NeuroScan's website.

Thanks in advance for the help.

Andre Cravo
---
University of Sao Paulo-Brazil
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