Why bother using the anatomy at all if you are going to change what it is
telling you?
To do what you suggest, one simply flips one of the masks to the other
hemisphere, takes the intersection of the two masks, and flips it back and
you have a symmetric ROI. You can do these things with fslmaths and
fslswapdim.
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 2:19 PM
To: [log in to unmask]
Subject: Re: [FSL] Anatomical definition of ROIs
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
That article says that morphologic asymmetries of area 44 provide a putative
correlate of the functional lateralization of speech production.
Calculating laterality index we just look for the lateralization of speech
production, so I think we shouldn't influence the calculation of this index
with the prejudge of asymmetry. Therefore in my opinion using symmetrical
ROIs are more rationale. Could anybody help with my original questions in my
previous mail?
Thanks,
Gábor
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