Hi, Brady-

It is hard to view a dset and understand it when no colorbar info is provided.

Looking at Figs. 8, 12 and 13, your data looks pretty normal:
[www.biorxiv.org]
... and I see Rick has replied already with more comments about this-- indeed, are you looking at the stat or the beta? We generally recommend *looking* at the beta (=coefficient) and thresholding with the stat when you want to.

In your data, regions outside the brain may have large betas, but they probably also have laaaaarge confidence intervals and smaller stat values. For more on the benefits of *that*, please check out Gang's compelling commentary here:
[www.sciencedirect.com]

--pt