Tbis volume discusses and evaluates the use of neurotoxins to produce animal models of human neurodegenerative diseases. Tbe models presented use neuro toxins to induce some or most of the pathophysiological changes (including behavioral) that characterize the most studied motor neuron disorders and cogni tive disorders (dementia) in humans. Within the biomedical research community, there is little doubt about the utility of such models. But with increasing frequen cy, individuals concemed with animal rights question the validity of such models and argue that they actually produce no useful...