Hi all,
I have imported Tutorial MEG data into Brainstorm, but when check the signal. It is wired. What was the problem? (By the way, everything was OK several day ago).
Thanks for your help.
Liu
If you are trying to follow the tutorials, there are many things that are wrong here (the events are missing, the configuration of the import window is incorrect...). Start over from the beginning and read carefully the instructions.
If you are trying to split the data in blocks of 1s for different objectives, are you referring to the fact that the signals appear flat? This is because there is a high arbitrary baseline value on each signal. To get rid of this, you need to apply a high-pass filter on the data or to use the option "Remove DC offset".
This is described in the introduction tutorials:
https://neuroimage.usc.edu/brainstorm/Tutorials/ReviewRaw#Amplitude_scale
https://neuroimage.usc.edu/brainstorm/Tutorials/Epoching
If this does not address your question, please describe better your problem.