Erin,
Donna's email covered most of the key points regarding foci for
surfaces and volumes. There's one additional point to add:
Is that possible? However, I also noticed that the foci function
only works on fiducial surfaces? Am I unable to put foci on the
surface and volume display?
Create a foci file as usual (http://brainmap.wustl.edu/caret/html/
file_formats/file_formats.html#cellFile -- foci and cell formats
are identical), but open it as Foci Files - Volume (the fourth of
the file types listed on the Open Data File menu). If you don't
see this option, you need to get an updated version of caret here:
It wasn't clear from your question whether you were also wanting to
view foci on other surface configurations, such as inflated surfaces
and flat maps, but didn't know how to do that. If so, the key step
is to use the Layers: Foci: Project fiducial foci option. Make sure
that the appropriate PALS average fiducial surface (e.g., AFNI or
SPM99) is in the main window for the foci you will be projecting.
If your meta-analysis includes foci from multiple stereotaxic spaces,
you can project each group separately onto the corresponding fiducial
surface, then combine the foci projection files into a composite.
These will show relative positions on the PALS surface (e.g., the
inflated PALS), but the 3D coordinates will depend on which aveage
fiducial surface is chosen.
Let us know if there are additional questions.
David Van Essen
