[Eeglablist] Channel Locations for BioSemi

[Makoto Miyakoshi]

Dear Vincent,

> If I set the labels to FP1, FP3 etc. instead of A1, A2, etc., I do get
coordinates.

Yes, this is what I experienced too. I guess 'pair channels' does not work
if you have non 10-5 channel names.

So my personal solution for this kind of dataset is that you chose 5 closet
channels (Fz -> ??, Cz -> ??, Pz->??, T7->??, T8->??) and rename them into
10-5 names. Then warp montage using these renamed channels. This is an ugly
solution but it still works and better than nothing.

Makoto

2013/8/6 Vincent LeBlanc <leblvin at gmail.com>

> Hi Enzo!
> If I keep the original labels, it can't find any coordinates. If I set the
> labels to FP1, FP3 etc. instead of A1, A2, etc., I do get coordinates.
> However, when I plot their location, some of the channels are off the head.
> Is that simply an effect of not having a 3D map of their localisation?
>
>
> 2013/8/5 Enzo Brunetti <enzo.brunetti at gmail.com>
>
>> Hi Vincent,
>>
>> eeglab's plugin 'dipfit' offers some head montages including some Biosemi
>> common layouts. When you use Edit/Channel locations, the displayed window
>> offers you to look up the corresponding coordinates for the labels present
>> in the .bdf file. Try clicking 'Ok' in this window to see if it helps you.
>>
>> Good luck.
>>
>>
>> El 05-08-2013, a las 13:51, Vincent LeBlanc <leblvin at gmail.com> escribió:
>>
>> Hi to all!
>>
>> I've been trying to correctly enter the BioSemi coordinates into eeglab,
>> to no avail. Using the excel sheet on their website (
>> http://www.biosemi.com/download/Cap_coords_all.xls) gives me absurd
>> results when plotting the channel positions.
>> I'm using the 64 electrodes cap. Does anybody have a clue on where/how I
>> could get those coordinates?
>>
>> Thanks in advance =)
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>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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