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Difference between a normal control rat and the marked drop out of pyramidal neurons in the CA3 region in a rat treated with domoic acid

(Left) Hippocampus of a control rat. CA3 regions. Chen/Bodian silver stain, Objective x20. (Right) Sections of the hippocampus of a rat treated with domoic acid, showing-marked drop out of pyramidal neurons in the CA3 region. Chen/Bodian silver stain, Objective x20. (Source: Pulido 2008. Creative Commons Attribution license. http://creativecommons.org/licenses/by/3.0.)