Metals: Methylmercury Neurotoxicity and its Uptake Action Across the BloodBrain Barrier (M. Aschner et al.). Neurotoxic Metals and Neuronal Signalling Processes (D. Minnema). Lead Poisoning, Toxocariasis and Pica (P.J. Donovick, R.G. Burright). Nocardia (B.L. Beaman). Toxicants: Neurotoxicity of Polychlorinated Biphenyls (R.F. Seegal, W. Shain). Central Nervous System Plasticity and Pathology Induced by Exposure to Organophosphate Pesticides (D.H. Overstreet, G. Schiller). Silver Ipregnation of OrganophosphorusInduced Delayed Neuropathy in the Central Nervous System (D. Tanaka et al.). Selected Mechanisms of Action: Acute and Chronic Neurodegenerative Disorders Produced by Dietary Excitotoxins (C.F. Zorumski, J.W. Olney). Formation of Excess Reactive Oxygen Species Within the Brain (S.C. Bondy, C.P. LeBel). Legal Issues: Courts, Agencies, and Social Risk Assessment (C.P. Gillette, J.E. Krier) 7 additional articles. Index.