Hi Fatima,
it's kind of a poorly-defined region, so I'm not sure how to answer. Those labels don't make up all of prefrontal cortex. Maybe the easiest thing to do is to draw it yourself on fsaverage and map it back to all your subjects. Or maybe Rahul could answer.
cheers, Bruce
On Wed, 9 Jun 2010, Ahmed, F, Me fahmed@sun.ac.za wrote:
Sorry for repeating myself, but I'm unsure if my first post got through successfully. My post is detailed below:
I require values (total volume) for the prefrontal cortex. I see labels for "G_frontal_middle" and "G_frontal_superior" in the lh.aparc.annot files - are these correct to use? If so, could I add up the values for these to get one total volume for the PFC?
Thank you, Fatima