[Eeglablist] external channel locations

[Andreas Widmann]

> I suggest you use AFp9 and AFp10 EEG channels. For VEOG, you need to make up dedicated channel locations. I thought I've seen VEOG channels in the EEGLAB's available channel list i.e., just enter SVEOG and IVEOG (or something like that; these list could be seen in head model setting GUI) and 'look up locs' and their default locations are automatically retrieved. Actually, I think I've seen it in this list recently.
You did :)
https://sccn.ucsd.edu/pipermail/eeglablist/2016/010868.html
https://sccn.ucsd.edu/pipermail/eeglablist/2016/010873.html

Raquel, where did you place your external electrodes?

Hope this helps,
Andreas

> 
> Makoto
> 
> Makoto
> 
> On Mon, Jul 25, 2016 at 5:54 AM, Raquel London <raquel at dragondelapatagonia.com> wrote:
> Dear EEG labbers,
> 
> I am struggling with the channel locations. When I import them (Biosemi, 64 electrodes, 10/20 system) I use a file that only has the locations of the 64 electrodes. Once imported, the external channels are not there anymore. 
> However, I still need them to compute the bipolar VEOG and HEOG for the ICA. I was wondering how I could solve this. 
> 
> Does anyone have a channel location file I could use that includes external electrodes?
> Can I modify the file and add locations for the externals? If so, how do I calculate the position or can I just invent something?
> Or is there another way to keep the channels that have not been assigned a location through the chanlocs file?
> Or am I just thinking about this in the wrong way?
> 
> Any help is much appreciated!
> 
> Raquel
> 
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> 
> -- 
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
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