FIG. 3.
Distribution of outcome measures resulting from different relative material properties. The left column shows results when grey matter (Etan = 65 kPa) was less stiff than the white matter (Etan = 165 kPa). The central column shows outcomes when grey (Etan = 115 kPa) and white matter (Etan = 115 KPa) properties were equal. The right column is outcomes when the grey matter (Etan = 165 kPa) is stiffer than the white matter (Etan = 65 kPa). The grey and white matter material boundary is outlined in each model. Shear outcomes show little sensitivity to variations in relative properties of the grey and white matter, while pressure and principal stress and strain patterns vary with changes in grey and white matter properties.