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Hello FT-ers, <br>
<br>
I was wondering whether anyone has an idea of what could be going on
in this topo of the group-averaged ERF (difference between 2
conditions, planar gradient). At first I thought that could be
muscle activity, but that pattern seems to hold regardless of the
time window I choose (and besides when I plot the EMG of some facial
muscles, they don't differ from each other...). <br>
What I noted now is that different sensors were excluded for
different participants around those areas so I'm suspecting that the
missing sensors are causing the problem (because of the way the data
is interpolated for plotting?).<br>
<br>
<img src="cid:part1.08030009.01040408@gmail.com" alt="" height="254"
width="244"><br>
I tried different options in ft_topoplot but all my attempts were in
vain. <br>
Next, I tried using ft_channelrepair. I assumed that the correct
order of processing steps would be to repair channels first, and
then calculate planar gradients after. If I follow that procedure, I
get the following error when running ft_megplanar (FT version
20140518):<br>
Reference to non-existent field 'chanori'.<br>
<br>
Error in ft_megplanar (line 242)<br>
chanposnans = any(isnan(sens.chanpos(:))) ||
any(isnan(sens.chanori(:)));<br>
<br>
If anyone could shed some light on these issues, it would be great!<br>
Thanks a lot, <br>
Vitoria<br>
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