Dear experts,

I have two questions about hemisphere analysis:

1) When I run left-right hemisphere paired t-test, can I add age as covariate? If use fsgd to add covariate, to this paired t-test analysis, how to make the fsgd table?
2) I want to reorganize the hemisphere from left-right to symptom-nosymptom according to body symptom side record and compare different between symptom hemisphere and nosymptom hemisphere. Can I use freesurfer to do it?

Thanks for your patient and help.

Lanbo Wang