Organomercury Compounds

General Information
"Organomercury, particularly alkyl-mercuric compounds (e.g. methylmercury), has a selective effect on the granule cells of the cerebellum, the nerve cells of the calcarine cortex, and the sensory neurons in the dorsal root ganglia." In other words, exposure causes developmental defects and mental retardation.

Chang, LW. "The Neurotixicology and Pathology of Organomercury, Organolead, and Organotin." J Toxicol Sci. Dec. 1990. http://www.ncbi.nlm.nih.gov/pubmed/2100318