>How do you get those local maxima? I don't know the appropriate procedure
I think they are reported by default in the feat web output pages but
they can also be generated using the cluster command. If I remember
correctly, the flag is --olmax. It should be clear from help screen
if you type cluster without any arguments.
I don't mean to be critical but if I were a reviewer, I wouldn't be
entirely happy with the method you describe. The problem is that the
AAL brain regions were determined on the macroanatomy of one brain
(Colin27) and therefore are not representative of any other brain,
let alone a group sample. Tzourio-Mazoyer and colleagues acknowledge
this explicitly in their paper. So the number (or percentage) of
voxels in each of the AAL regions is not accurate and the precision
of the reporting hides this fact. In addition, if not all AAL
regions were imaged (or some where only partially imaged), this too
may mislead the reader regarding the the amount of activation in any
given region.
Wouldn't it be more appropriate to describe the activations yourself,
based on their extent into various macroanatomic regions seen in the
group mean structural?
- Joe
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