Hi John,
you would use a sine and cos at the fundamental. Unfortunately, our
retinotopy analysis is rather finnicky about the data formats and
directory structure, so you might want to use the FreeSurfer functional
analysis tools. It's on my list to generalize it ...
doug
McLean John (NHS Greater Glasgow & Clyde) wrote:
Hi,
I am hoping to perform a retinotopic mapping fMRI study.
My paradigms consist of a reversing checkerboard annulus which increases and
decreases in size and a reversing checkerboard wedge which moves clockwise dor
180 degrees and then anticlockwise.
I am struggling to correctly perform the fMRI analysis. I hope to use FSL so
that i can then overlay the functional data on the flattened visual cortex
using freesurfer.
My problem is that i do not know how to correctly model the fMRI data using
FSL, i believe i should use a sinusoid model but i am unsure of how to proceed.
Would anyone with experience in this area be willing to discuss these issues
with me?
Thanks for your help,
John
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