I've the activation map resulting from a single subject experiment
with finger tapping task. The peak of activity I observe in the
primary motor cortex usually extends to other areas (e.g., parietal
areas), but I need to isolate and extract the portion of the cluster
having the peak of activity in the primary motor cortex, using a
threshold of p=0.05 uncorrected. Does anybody know a method to isolate
and “cut” (and save as a .img) the portion of the cluster in the
primary motor cortex?
Normally, to do this, I use Marsbar and I know that it is possible to
select subclusters from one single cluster. However, the problem is
that it is not possible to precisely match the coordinates of my
selected cluster with its spatial location on the activation map (that
I do not want to normalize!) appearing on the glass brain.
Thank you in advance