The lobes of the brain most likely to be injured are the frontal and temporal lobes.

The first trilobites appear 1400 m above the boundary, which corresponds to the beginning of the Branchian Series.

And then intense magnetic fields directed some of the energy of that gravitational collapse. And some of the matter, back out in the form of tremendous jets which illuminated lobes with the brilliance of I think it's a trillion suns.