you could draw a box including those coordinates in a talairach volume then apply the inverse talairach.xfm transform with mri_convert to map it into subect anatomical coords, then sample that onto the surface. Note that the new version of FreeSurfer will include explicit estimates of the borders of several motor areas (3a, 4a, 4p, 6).

cheers, Bruce

On Fri, 30 Jul 2010, Ben Hamida Cammoun Leila Faiza wrote:

Hi I am trying to find different Talairach areas in the motor cortex. I used the mris_convert -t function on the inflated brain (.asc). I selected coordinates using ranges from a paper (for example range x -70 to 4; range y -43 to 7 and range z 19 to 76 for M1). But when I want to see if they are in the wright area with tksurf on the same surface (inflated), the coordinates change.

Do you know how to find the wright coordinates?

Thanks

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