[Eeglablist] a few issues with electrode locations

Jasna Martinovic j.martinovic at liverpool.ac.uk
Mon May 17 08:03:34 PDT 2010


hi,

I'm trying to reject bad channels and interpolate them using EEGlab.

I first reject the bad channels using 'automatic channel rejection', 
then I end up with a lower number of channels which I subsequently 
interpolate by using the locations from the previous dataset. Is this 
the correct way to do this?

My problem is that once this is done, the new interpolated channels are 
added to the top of the channel structure - say, if I interpolated 5 
channels then 1-5 will now be these new channels. I would like to 
maintain the original structure of channels in all files, as having 
different order between participants will create a right mess. Is there 
a way to do channel interpolation while avoiding this problem?

Also, I want to include the locations for the four eye channels. I have 
found in the EEGlab archive that Andreas Widmann has suggested to use 
the Lo1, Lo2, So1 and So2 locations provided in a file from Robert 
Oostenveld's blog. But the link doesn't work any more as the blog's been 
reorganised. Could someone please re-post an updated link or post the 
locations for these 4 channels?

Thanks in advance for your help!

Kind regards,
Jasna

----
Dr Jasna Martinovic
School of Psychology
University of Aberdeen
William Guild Building
Aberdeen
AB24 2UB

tel: 01224 272240
email: j.martinovic @ abdn.ac.uk
web: http://www.abdn.ac.uk/~psy527/dept/






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