Dear SPM-experts,
we are currently planning a fMRI-experiment where we apply experimental pain stimuli (300ms) with a subsequent visual request to rate whether the stimulus was painful or not. I would like to show the request immediately after stimulus application to measure reaction time but I am very uncertain whether this would be ok or whether I will have difficulties to separate the BOLD responses from stimulus, visual request and hand movement.
If it is advisable to temporally separate stimulus and request, what would be a reasonable time?
Also, could you please recommend some papers on this topic?
Thank you so much for all your help!!
carmen
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