http://articles.mercola.com/sites/articles/archive/2008/01/02/mercury-reaches-brain-directly-through-nerves.aspxDespite its inability to pass through the brain's protective barrier by way of the blood circulation, studies in fish suggest that mercury, which is toxic to brain cells, can travel directly to the brain through nerves. According to the research teamenCommunityServer 2008.5 SP1 (Build: 31106.3070)