We are using Freesurfer v5.3 with the recent Jacobian area correction, but 
there may be a subtle bug that affects longitudinal studies. In a pediatric 
population, we see area growth on top of gyrii, and area loss in the base of 
sulci. This effect may be a true morphological change, but it may be due to an 
approximation error of a curved area by planar surfaces in regions of high 
curvature. Is there a command or script to compute an "adjusted area" on a 
vertex-wise basis? For every vertex, I would like to compute something like:
Adjusted area = Area*(1 + G*d^2*k^2)
where Area is the v5.3 area, G is a constant, d is the local vertex spacing, 
and k is the local mean curvature.

Thank you,
Paul K. Mazaika
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