This guide to understanding and preventing dementia is aimed at general readers, caregivers, health professionals, and family members of impaired patients. Levine provides an overview of types, causes, symptoms, and diagnosis; discusses normal aging, mild cognitive impairment, and pseudo-dementia; and examines Alzheimer's disease, Pick's disease, Parkinson's disease with dementia, Dementia with Lewy bodies, and vascular and mixed dementia. Preventative measures, such as exercise, cognitive stimulation and socialization, and diet, are preceded by a discussion of causes of accelerated brain aging and other factors. Levine is former chief of neurology at Norwalk Hospital and professor of medicine at Yale U. School of Medicine. Annotation ©2006 Book News, Inc., Portland, OR (booknews.com)