[Eeglablist] No Channel Location for Some Electrodes

[Samuel Sui Lung Sze]

Dear Mr Tech,

Thank you so much for your help, Mr Tech.

As I am new to EEG processing, I do not know how I should approach the coordinate location. Are the default PAN xyz coordinates equivalent to Cartesian coordinates as EEGLAB asks me to input Cartesian coordinates instead of the PAN xyz coordinates?

Thank you!

Best regards,
Samuel
________________________________
From: CURRY 9 Help <curry9help at neuroscan.com>
Sent: 23 August 2022 18:36
To: Samuel Sui Lung Sze <u3564255 at connect.hku.hk>; eeglablist at sccn.ucsd.edu <eeglablist at sccn.ucsd.edu>
Subject: Re: [Eeglablist] No Channel Location for Some Electrodes

Dear Samuel,

These are the default PAN xyz coordinates for the 32 channel Net cap:

Fp1    -29.00    104.54    33.13
Fp2    30.00    104.65    34.12
F11    -74.00    46.77    -30.62
F7    -70.00    61.89    30.04
F3    -52.00    76.78    88.71
Fz    2.00    88.73    113.49
F4    53.00    78.65    87.49
F8    70.00    61.25    33.14
F12    74.00    44.49    -24.31
FT11    -80.00    18.56    -39.41
FC3    -62.00    47.61    106.20
FCz    3.00    57.27    137.29
FC4    63.00    48.37    104.10
FT12    79.00    16.39    -32.11
T7    -84.00    3.52    38.85
C3    -69.00    14.76    118.08
Cz    3.00    22.03    154.49
C4    69.00    15.76    117.97
T8    84.00    3.98    42.83
CP3    -67.00    -22.98    122.48
CPz    3.00    -17.82    158.12
CP4    67.00    -19.01    122.02
M1    -76.00    -41.25    8.83
M2    77.00    -38.46    15.55
P7    -73.00    -54.51    50.65
P3    -56.00    -55.16    114.15
Pz    2.00    -52.91    142.08
P4    56.00    -53.17    113.92
P8    72.00    -52.17    53.40
O1    -29.00    -91.85    67.08
Oz    1.00    -94.02    74.38
O2    30.00    -90.75    67.96

VEOG and HEOG don't have standard locations. Those channels contain
difference data from two electrodes.

Best regards
Reyko

On 22-Aug-22 16:14, Samuel Sui Lung Sze via eeglablist wrote:
> [CAUTION EXTERNAL MESSAGE: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe.]
>
> Dear all,
>
> I acquired some EEG data with a Neuroscan Quik Cap Net 32. When I tried to load channel location using "pop_chanedit()", I received the message below:
>
> Channel lookup: no location for F11,F12,FT11,FT12,VEOG,HEOG
>
> It seems that MNI coordinate file does not contain location coordinates of these channels.
>
> I have searched for the channel location file for this cap, but I could not find one. Some links to the files seem invalid. Could you please help me with that?
>
> Thank you so much in advance!
>
> Best regards,
> Samuel
> _______________________________________________
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--
Reyko Tech
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