[Mne_analysis] MNE source estimate analysis with multiple conditions

[Lyam Bailey]

Dear MNE users,


I am analysing surface-based source estimates computed from evoked MEG data. I would like to extract peak amplitude times from source estimates of the difference between two experimental conditions (exp. and control), and as far as I can tell there are two approaches to this. One is to calculate the difference prior to computing source estimates (i.e: exp. evoked - control evoked) and then compute source estimates (.stc) based on the returned array. Another is to generate source estimates for each condition, and then subtract the returned stc files (exp.stc - control.stc) Unfortunately, these two approaches yield slightly different results (I suspect this is due to noise generated by the .stc subtraction) - so which would be most prudent? Alternatively, is there a different (more robust) approach that I could use?


Thanks in advance for any help!


Regards,

Lyam



---------------------------------------------------------

Lyam Bailey, BSc.

Graduate Student
Department of Psychology & Neuroscience
Dalhousie University

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20170406/b96770f1/attachment.html