Thanks for your answer.

Furthermore, if I read the mri_preproc data (Group.mgh) by load_mgh in Matlab as below,

Data=load_mgh(Group.mgh)

then the size of Data =(163842,1,1,3)

So, is the Data(2,1,1,3) represented the cortical thickness of the third subject (from fsgd file) on the second vertex (vertex number = 1)?

> Thomas Yeo
> Mon, 19 Sep 2011 02:45:50 -0700

> 0 to 163841

> On Mon, Sep 19, 2011 at 3:44 PM, orangekic <orange...@gmail.com> wrote:
>> Hello,
>>  I am wondering if there are 163842 vertices in fsaverage,
>>  will the vertex number be from 0 to 163841 or 1 to 163842 in the label
>> file?
>> Best,
>> KIC