chapter 1 Introduction -- chapter 2 Muscarinic Receptor Antagonists in Rats -- chapter 3 Nicotinic Receptor Antagonists in Rats -- chapter 4 Involvement of the NMDA System in Learning and Memory -- chapter 5 Animal Models and the Cognitive Effects of Ethanol -- chapter 6 Animal Models of Cognitive Impairment Produced by Developmental Lead Exposure -- chapter 7 Developmental Behavioral Toxicity of Methylmercury: Consequences, Conditioning, and Cortex -- chapter 8 Executive Function following Developmental Exposure to Polychlorinated Biphenyls (PCBs): What Animal Models Have Told Us -- chapter 9 Modeling Cognitive Deficits Associated with Parkinsonism in the Chronic-Low-Dose MPTP-Treated Monkey -- chapter 10 Cognitive Impairment in Transgenic Mouse Models of Amyloid Deposition -- chapter 11 Cholinergic Receptor Knockout Mice -- chapter 12 Assessments of Cognitive Deficits in Mutant Mice -- chapter 13 Cognitive Pharmacology in Aging Macaques -- chapter 14 Cognitive Impairment following Traumatic Brain Injury -- chapter 15 Cognitive Impairment Models Using Complementary Species -- chapter 16 Cognition Models and Drug Discovery.