Hi,
I have two questions:
1) In an fMRI experiment, we have 64 stimulus conditions and a baseline condition. All conditions are presented in each run. After running the analysis:
mkanalysis-sess -a category.rh -surface self rh -fsd bold -fwhm 3 -event-related -paradigm paradigm_category.par -nconditions 64 -refeventdur 1 -TR 2 -polyfit 2 -spmhrf 0 -mcextreg -per-run -force
selxavg3-sess -s subj1sess1 -a category.rh
We load beta.nii.gz in Matlab. It has 131546 rows corresponding to the vertices in rh, and 118 columns. The first 64 columns correspond to the stimulus conditions that we have. I guess the next 6 columns correspond to the motion regressors. What are the remaining 48 columns?
2) When we run selxavg3-sess with -run-wise:
selxavg3-sess -s subj1sess1 -a category.rh -run-wise
We have a beta.nii.gz file for each run. But this time, each beta.nii.gz file has 70 columns. Why the number of columns here is different from that in the beta file generated without -run-wise?
Thanks for shedding light on this issue!
Reza