Hi,

I want to divide my cingulate labels into anterior and posterior
cingulate labels. This divison is based on a line perpendicular to the
AC-PC axis, and through the AC.

Currently, I am trying to do this by using csurf and clicking and
saving points along the Tal = 0 coordinate within the midsagittal
plane of the tkmedit view. I then go to the points in the tksurfer
view and then draw  a line here to create a new label. It seems that
there must be an easier way of doing this using the code that csurf
employs to link the volume and surface coordinates.

If you could suggest a method for automating this, I would greatly
appreciate it.

Thanks,
Avinas