Afterbrain

Below the hindbrain, in the vicinity of the afterbrain, the spinal furrow does not close, and there remains here an open passage-way to the contiguous lower portion.

From the evolutionary standpoint, the afterbrain will never develop if the forebrain makes all of the decisions.

[...] Ehrlingarns call the “afterbrain”. It is where telepathy and telekinesis are controlled. Telepaths have that organ greafly enlarged. In fact, some of them have trouble with it pinching off nerve impulses between the body and the cerebrum.

The division in the fore-, middle- and afterbrain is based on the development of the human brain during the embryogenesis.