T1-weighted image based automated parcellation of the primary motor area (BA 4) and pre-motor area (Brodmann area 6) using FreeSurfer. The labels are anterior BA 4 (white), posterior BA 4 (yellow), pre-motor area (green). (A,B,C) shows top view, lateral view, and midsagittal view respectively of normal surface. (D,E,F) show top view, lateral view, and midsagittal view respectively of the inflated surface.