Update systemDependentParse.m

[y-q-l]

Hello, there seems a small error in this code:

line 154, 172, 369, 387: 'E14' should be 'E15' (For the EGI HydroCel-128 Net, the PFz should be 'E15', not 'E14')

I did not check other parts of this toolbox for the MARA-lable issue. Thank you.

[ksgfan]

Hi

we set the labels according to this paper: https://www.researchgate.net/publication/266609828_Determination_of_the_Geodesic_Sensor_Nets%27_Average_Electrode_Positions_and_Their_10_-_10_International_Equivalents

Based on this paper the FPZ is similar to E14, E15 and E21, with E14 being the closest one.

But of course, when looking at: https://www.researchgate.net/figure/Hydrocel-Geodesic-Sensor-Net-128-channel-map-Grey-indicates-the-outermost-belt-of_fig2_331096828 the E15 makes more sense.

Either way it should not be a big issue.

Best, Dawid

[y-q-l]

Hi Dawid,

Thank you for your information.

E14 (also E21) is more suitable as an EOG channel rather than as FPz. The E14 is considered as an EOG channel in the default preset for EGI format -- “preset-values-of-langer-lab”: https://github.com/methlabUZH/automagic/wiki/How-to-start#preset-values-of-langer-lab

The NetStation Acquisition Technical Manual (page 251) also highlights E14 in the eyes montage: https://psych.colgate.edu/~bchansen/EGI_GES_INFO/NetStation_Acquisition_Technical_Manual.pdf

In practical EEG recording, the E14 serves more like an EOG, see figures (128-channel HCGSN, front view): https://docplayer.net/docs-images/84/89444066/images/31-0.jpg https://docplayer.net/docs-images/82/85401177/images/31-0.jpg

In addition, FPz localizes at midline, but E14 at the right side. We should be very cautious when using E14 to represent FPz. This may elicit unexpected issues involving symmetrical or asymmetrical prefrontal activity.

Best, Yiqing

[ksgfan]

Thank you for the code and useful information!

Best, Dawid