[Freesurfer] Reference about: MeanCurv, GausCurv, FoldInd, CurvInd?

H!

I am working with data which is an output from the FreeSurfer processing.

I would like to kindly ask you to refer me to materials / precise "mathematical" definitions that could help to understand what are the following parameters:

* ?MeanCurv - Integrated Rectified Mean Curvature, * GausCurv - Integrated Rectified Gaussian Curvature, * FoldInd - Folding Index, * CurvInd - Intrinsic Curvature Index.

(I have been trying to google but not been successful, unfortunately.)

Kind regards,

Marta Karas, M.S. Research Assistant, Department of Biostatistics Richard M. Fairbanks School of Public Health and School of Medicine Indiana University tel: 317-665-4551 email: mkaras@iu.edumailto:harezlak@iu.edu