The American Medical Association calls mercury poisoning of the spinal column Multiple Sclerosis. Multiple Sclerosis is Mercury Poisoning.
http://articles.mercola.com/sites/articles/archive/2014/08/05/dental-amalgam-mercury-poisoning.aspx
http://articles.mercola.com/sites/articles/archive/2014/08/05/dental-amalgam-mercury-poisoning.aspx