If you don't want it to go into the folds of the sulci, you may want to use the brain surface from mri_watershed (note you will have to re-run with --save). This option is probably the simplest and most straightforward. If you are unhappy with those results there are many other options, which could be created to generate more detailed results. However, this would be the simplest "out of the box" solution.

D

Bruce Fischl wrote:

Hi Phiroz,

I'm not sure I understand, but I think what you could do is create a volume representation of the grid, then sample it onto the surface with mri_vol2surf

cheers Bruce

On Fri, 6 Apr 2012, Phiroz Tarapore wrote:

...

Hello,

I have been trying to figure out if it is possible to overlay a grid on a surface (such as the regular non-inflated pial surface). I would like the grid to ignore the cortical convolutions and follow just the overall curvature of the cortex.

I am trying to represent a grid of electrodes on the surface of the cortex, as would be placed in the operating room for surface cortical recordings (ECOG). Is there a way for me to do this?

Thanks for your help.

Phiroz _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

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