Inflation, registration and projection of the GM/WM boundary for a subject.

GM/WM surface convexity is color-coded (Gyri  =  green, sulci  =  red). (A) Anatomical image and GM/WM boundary of a subject; (B) Inflated GM/WM boundary of left hemisphere; (C) Registered GM/WM surface in a spherical coordinate system; (D) Mollweide projection map of the registered spherical surface. HG1  =  anterior Heschl's gyrus; MTG  =  middle temporal gyrus; STG  =  superior temporal gyrus.