I have a conundrum with my DARTEL-VBM data.

I have this region showing a difference - see image attached.  But this single blob traverses two lobes: temporal and parietal.  (It also follows the border of the insula but does not overlay it.)

The question arises - what is the most likely explanation?

- there is a single blob in one of the regions, but there is some inaccuracy involved in relating this to the canonical T1.  If so how to deal with this?

- there are 2 blobs in 2 regions, which (either coincidentally or not) are contiguous

Please assume that I have carried out the preprocessing appropriately (which I have).

Merci beaucoup :)

Justine