Hello everyone,
I am looking at a visual stimulus vs fixation contrast in my individual subjects' data to make sure we are seeing normal activation there. If I look at the surface data in tksurfer, I see activation in the occipital cortex, but in the mni305 analysis, there is no activation in this region.
These are the preprocess , mkanalysis, and selxavg commands I used for the surface vs. mni305:
preproc-sess -s amur_dss -df sesspar -per-run -fwhm 5 -sliceorder down -surface fsaverage lhrh -mni305-2mm -fsd cond
mkanalysis-sess -fsd cond -surface fsaverage lh -fwhm 5 -paradigm Fear_Gen_Cond.par -event-related -TR 3 -nconditions 3 -polyfit 4 -spmhrf 0 -refeventdur 6 -analysis cond.sm05.lh -per-run -nskip 4 -stc down
mkanalysis-sess -fsd cond -surface fsaverage rh -fwhm 5 -paradigm Fear_Gen_Cond.par -event-related -TR 3 -nconditions 3 -polyfit 4 -spmhrf 0 -refeventdur 6 -analysis cond.sm05.rh -per-run -nskip 4 -stc down
mkanalysis-sess -fsd cond -mni305 2 -fwhm 5 -paradigm Fear_Gen_Cond.par -event-related -TR 3 -nconditions 3 -polyfit 4 -spmhrf 0 -refeventdur 6 -analysis cond.sm05.mni305 -per-run -nskip 4 -stc down
selxavg3-sess -s amur_dss -df sesspar -analysis cond.sm.lh selxavg3-sess -s amur_dss -df sesspar -analysis cond.sm.rh selxavg3-sess -s amur_dss -df sesspar -analysis cond.sm.mni305
Why might we be seeing this activation on the surface map but not the volume one?
Thanks! Emily