If you have a label defined on the lh or rh of fsaverage, you can map it to the contralateral hemi with something like

mris_apply_reg --src-label lh.your.label --streg lh.sphere.left_right rh.sphere.left_right --trg rh.your.label

where the left_right files are in fsaverage/surf

On 3/29/18 2:02 PM, Abigail Noyce wrote:

Hi, I have pored over (I think) all of the mailing list postings about cross-hemisphere mapping and I can't quite figure out how to do this.

I have a bunch of labels on fsaverage, and I want to be able to check/visualize the relationship between lh and rh versions of the labels.

I can do mri_label2label to map from fsaverage to fsaverage_sym, but that doesn't do the right thing, and fsaverage doesn't have the same kind of xhemi registration structure that "normal" subjects get with surfreg --xhemi. I guess I could back-project onto a normal subject and then project to fsaverage_sym, but that seems like an unnecessary step.

How can I get mirror-projected labels from fsaverage on fsaverage_sym?

Thanks! Abby -- Abigail L. Noyce, Ph.D. Psychological & Brain Sciences Boston University

anoyce@bu.edu mailto:anoyce@bu.edu 617-440-3640

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