[FieldTrip] epilepsy example

[Alain de Cheveigne]

Hi all, 

I've been going through the 'Virtual channel analysis of epilepsy MEG data' tutorial (https://www.fieldtriptoolbox.org/tutorial/epilepsy/), and I noticed that the CTF data for case3 has what looks like a flux jump, see below.  The code applies a high-pass filter that turns this into a spike which might drive the locations of high kurtosis in the beamformer images. 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: PastedGraphic-2.pdf
Type: application/pdf
Size: 167068 bytes
Desc: not available
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20240324/06bec4b2/attachment-0001.pdf>
-------------- next part --------------

Other examples seem OK, but it's hard to judge the outcome without ground truth. 

Is anyone aware of MEG/MRI data with labels that could be plugged into the tutorial?  The ideal would be data labeled for the type of activity that a surgeon would really like to localize, e.g. interictal or pre-ictal onset.

Alain