Hi,
I have a baseline period followed by a stimulus period, which was either active or passive stimulus condition, in my fmri data and I want to compare responses between the two stimulus conditions.
Group map showed difference (active > passive) in a brain region R1.
I used the activated blob as a mask (mask_R1) and then first used featquery to extract percent signal change (%SC) in mask_R1 for the stimulus EV. %SC was higher in active than passive stimulus condition. Of course this is expected.
I then wanted to plot its time course. I used "fslmeants -i filter_func_data -o output_name -m mask_R1" to extract the time series in mask_R1 for each individual, demean them individually, and then extracted the time series values representing active and passive stimulus, respectively. However, the curve did not show higher time series values during active than passive stimulus condition. Even, passive data were higher than active ones.....
Does anyone know where did I go wrong?
Thanks in advance.
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