A sphere or a circle? If circel, you can create a delta functon (a map on the surface where everything is 0 except your vertex which is 1.0) with mri_volsynth, specify the delta column to be your vertex number. Then smooth with mris_fwhm, then threshold with mri_binarize at some very low value (eg, 1e-6), then visualize this map to see a circle

On 08/08/2017 12:15 PM, Redwan Maatoug wrote:

Hi everybody,

I have a .annot file and I would like to display a sphere above one certain vertex. (I know the coordinates of the vertex)

Someone knows a way to do that ? Thank you very much, Redwan

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