Hello Freesurfer team,

 

I am interested in doing one glm analysis using both the thickness and cortical surface area. 

 

My question is two-fold:

 

First, is it possible to provide both the thickness and area files to mris_preproc and mri_surf2surf commands or is it only possible to run two separate glms (one for thickness and one for area)? 

 

Second, can we consider thickness and area as separate values or are they both correlated? In other words, how correlated are the thickness and area values? 

 

Thanks in advances,

Tejaswi