[Freesurfer] Errors in LGI computation

Dear Freesurfers, I try computing the local gyrification index following the method developed by Marie Schaer and her colleagues. The process itself finishes without errors, yet there remain large grey areas of variable size on the cortex, indicating errors in the computation of the gyrifi

[Freesurfer] Eliminate variable which is the same for all patients from FreeSurfer's Design Matrix

Dear all, I am trying to correlate psychometric measurements and the local Gyrification Index. To do so, I use the FreeSurfer pipeline to calculate the lGI and then PALM, following the advice in this thread (https://mail.nmr.mgh.harvard.edu/pipermail//freesurfer/2017-March/050703.html). All

Re: [Freesurfer] Eliminate variable which is the same for all patients from FreeSurfer's Design Matrix

Hi Douglas, thanks for the advice. I have one more question: I want to find correlations of the lGI and the respective psychometric measurement, regressing out the effect of gender, sequence and the other covariates. I just had a look at the examples of FSGDs containing two factors with two