[Eeglablist] Difficulties with Channel Locations

Jessica Satterwhite jessksat at nmsu.edu
Tue Mar 17 14:28:24 PDT 2015


I am having trouble reading the channel locations in EEG data. The bdf data file I am trying to analyze has a total of 137 channels including 8 face electrodes and a GSR sensor. The .elp file of the same subject which contains the digitized head model has a total of 128 channels as we did not digitize the face electrodes or GSR. When trying to read the channel locations from the .elp file, an error returns stating that the channel locations were not saved because the number of channels in the .bdf data file does not match the number of channels in the .elp file. We really would like to add the face electrodes in ICA so that noise from facial muscle movements can be removed from the data. Is there a way to make the number of channels match so that channel locations can be read while still keeping the extra face electrodes? If not would taking out these electrodes effect the efficiency of ICA? Do I need to digitize the face electrodes so that they also have a location to do ICA effectively?

Any help anyone could give me would be greatly appreciated.

Thank you,

Jessica Satterwhite
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