Hi Don, the average thickness is not weighted by vertex area. The volume computation is relatively simple: the volume of a vertex is computed as the thickness * the average area of the triangles that are adjacent to the vertex.

doug

On 12/05/2012 06:35 PM, Donald Hagler wrote:

Is there a detailed description somewhere of how the gray matter volume values are calculated for the aparc stats files?

Also, is the average thickness weighted by area?

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