Hi Dara,
You can certainly use either one as Doug says, but depending on your purposes, one or the other may have some virtues. 2005 consists of discrete sulcal and gyral labels with traditional anatomical names so there are a lot more labels (which is why Doug describes it as very detailed), whereas aparc in general collapses these into summary regions.
But it is not a a simple case of lumper vs splitter....For instance it seems that
Aparc divides the cingulate into rostral anterior, caudal anterior, posterior cingulate whereas in aparc 2005 it is lumped into one cingulate label
Aparc shows the corpus c. nicely (I think there may even be a subparcellation available in development) whereas the cc is lost in the medial wall in 2005.
Aparc differentiates the pars orbitalis nicely on the orbital surface from the rest of the ofc, aparc 2005 does not possibly of interest to someone who is looking at ventrolateral pfc and its neighbors
Aparc includes in its lateral ofc label everything lateral to the rectus gyrus, including the central ofc and the (unlabeled) transverse sulcus neither of which would be understood as being in the lateral ofc as that term is typically used today.
Aparc 2005 shows a view that nicely differentiates the rectus gyrus on sagital section from the adjoining, whereas aparc lumps a broad territory into medial OFC
Aparc 2005 includes parcellation of the Insula, aparc does not and it is lost in the unknown medial wall (there has been talk of fixing this but is this real, Bruce or Doug?)
Perhaps what we need is a best of aparc and aparc 2005.
For surfing purposes you can also fool tksurfer into showing you the names of the (typically more more detailed) 2005 parcellations while viewing the brain labeled with the aparc labels which at times have more detail though I have never asked Doug if this will always work correctly.
If others have discovered pros and cons in other regions, please share.
Best,
Carl
Carl E. Schwartz, M.D. Harvard Medical School Director, Developmental Neuroimaging & Psychopathology Laboratory Psychiatric Neuroscience Program Massachusetts General Hospital tel 617-726-8965 fax 617-726-4078