Can you all help in identifying the options for detrending and demeaning the data on brainstorm? https://neuroimage.usc.edu/brainstorm/Tutorials/ArtifactsFilter?highlight=(detrend)
Also, I am not sure, if a high pass filter with cut-off at 0.3 Hz would be needed after detrending/demeaning. Can you share your thoughts on this ?
You can remove the DC offset from all channels when you visualize and import data in Brainstorm. As for high pass filtering, it's a practical way to remove trends and slow fluctuations of no interest in the data. The high pass frequency value will depend on your frequency range of interest for your current study.