I have a ba 32 (combined) mask and I am trying to obtain from this (or by any other means) 2 masks for the dorsal and ventral sections of ba 32. Can anyone suggest how I might do this? There is an earlier email on the mailing list suggesting manual segmentation using the information in a supplement published with Shackman et al 2011, but I could not find the information and I am not sure how to go about this. I would be really grateful for any clues / advice