What if the cortical areas really are asymmetric (as was reported for area
44 in Amunts et al 1999).
Peace,
Matt.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Gabor Perlaki
Sent: Friday, July 22, 2011 1:40 PM
To: [log in to unmask]
Subject: [FSL] Anatomical definition of ROIs
Dear all,
I'd like to use left and right Broca's areas of Jülich histological to
calculate an asymmetry index, but I want to use a method where definitely
important, that the two ROIs should be symmetrical. I've seen that the
Broca's areas from Jülich histological atlas included in FSL are not
totally symmetrical. Is it possible to get symmetrical ROIs based on these
atlas? For example, is it OK if I mask the right Broca with the flipped left
Broca, and the left Broca with the flipped right Broca to get symmetrical
Broca's areas? Or just simple flip one of the ROIs to get the contralateral
ROI? I don't know wheter MNI152 is "symmetric enough" to use such solutions.
Does anybody has any suggestion how to generate symmetrical Broca's areas in
FSL with identical size and shape which are reasonable to calculate
laterality index???
Thanks a lot,
Gábor
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