Hi Alon

it is difficult to exclude hippocampus without cutting of some of entorhinal cortex, so we chose not to try. The ribbon should include all of cortex, plus a bit of some of these MTL areas. Should be almost all gray matter though (except for some internal wm bundles like the perforant path)

cheers Bruce

On Wed, 26 Sep 2018, Alon Baram wrote:

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Hello, I'm trying to understand what do the files ?h.ribbon.mgz include as part of the ribbon mask. It's obvious they include all the GM between the white and pial surfaces, but they also include some voxels which are not GM (according to aparc+aseg.mgz). For example, ?h.ribbon seems to include some of the hippocampus, but not all of it (seems to me like it's the ventral/inferior part that is included). How is it decided what is included in ?h.ribbon and what isn't?

Thanks!