In Minamata, Japan, many people were intoxicated, and suffered from damaged brains because of fish loaded with mercury from industrial wastes spread into the Minamata Bay.
Neurology is thus an important area related to mercury.
There are references on other lists in this collection, on how and where mercury is distributed in the body to other organs than the brain. When mercury is deposited in the CNS, it will remain there. It is, as if these deposits are stable, but more for lack of knowledge of what happens in these deposites, than from a belief that they are stable. One could argue for fundamental stability, or one could argue for fundamentally dynamic behaviour. The stability argument has been used for amalgam.