You can copy the rh gyrification index to xhemi/surf/lh gyrification index, ie, copy it to xhemi/surf, but change the name so that it appears to be lh instead of rh doug
On 8/27/14 5:47 AM, angela.favaro@unipd.it wrote:
Hi Doug, is there a way to perform asymmetry analyses for local gyrification index? In my xhemi folders there is no LGI surface.
thank you Angela
You can use --paired-diff-norm instead of --paired-diff, this will compute
(L-R)/((L+R)/2)
You can then divide the output by 2, eg,
fscalc output.mgh div 2 -o output.div2.mgh
doug
On 8/24/14 9:52 AM, angela.favaro@unipd.it wrote:
Hi all, I have a question about hemispheric asymmetry analyses. The example given in the wiki shows how to compare lh and rh using a paired t-test. Is it right? But how can I calculate (and then compare groups) the laterality index (L-R)/(L+R)? Thank you very much for any help
Angela
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