An earlier brain scan performed at Cedars-Sinai Medical Center found "moderate reductions in the anterior mesial regions of the temporal lobes."

A vertical longitudinal mesial band, named, from its sickle shape, falx cerebri, dips between the two hemispheres of the cerebrum.

The toxicognaths are relatively weaker than in the orders hitherto considered, and have their basal segments less firmly fused mesially.