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Hi Experts,
After completing long_mris_slopes to get the rate of change and then
concatenating them into one.mgh file for group analysis (mris_preproc). I
am finally getting to mris_glmfit. Got a couple of questions along the way.
1). if I conducted long_mris_slopes, and got for example,
lh.long.thickness-rate.fwhm10.fsaverage.mgh. Do I need to do a surface
smoothing again (mri_surf2surf) before mris_glmfit?
2). I construct covariates in FSGD besides the group contrast that I am
interested in. How do I add covariates into the glmfit model to control for
the covariates as I contrast groups in terms of the rate of changing (CV
vs. NCV groups) . Do I add them into --C as (1, -1, 0(age), 0(gender),
0(race)).
mri_glmfit
--y {$hemi}.{$meas}-rate.{$smoothness}.mgh
--fsgd FSGD/{$study}.fsgd doss
--C Contrasts/CV-NCV.mtx (1, -1)
--C Contrasts/NCV-CV.mtx (-1, 1)
--surf fsaverage {$hemi}
--cortex
--glmdir {$hemi}.{$meas}-rate.{$study}.{$smoothness}.glmdir
Best,
Zeno
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