Confusion. Fear. Isolation. This is the human experience of dementing illness, and it is at the heart of this practical volume by a broad range of clinically grounded experts. This book is designed to meet the needs of clinicians dealing with persons with dementing illness and to serve as an introduction to the pathophysiology of dementing illness and a resource for clinical investigators. The giant strides in dementia research since the publication of the first edition in 1991 have generated optimism that we will soon be able to delay onset and even prevent these diseases that devastate both patients and caregivers. This third edition has been revised, updated and expanded to cover changes in the classification, management and treatment of dementing illnesses and to give a more extensive account of basic and clinical research findings. At the same time, this volume indicates the interaction of the patient's personality, the caregiver, and the environment with the pathophysiology of dementing illnesses that creates the variety of symptoms accompanying these illnesses and impacting their treatment. Like the second edition, this third edition has three sections, flowing from diagnosis through management/treatment to research. New to this edition are: a presentation on the molecular and genetic basis of Alzheimer's disease: an illustrated chapter on contemporary neuroimaging; and discussions of mild cognitive impairment, the frontotemporal dementias, and the dementias associated with Lewy bodies This edition should be useful for addressing the day-to-day challenges of dealing effectively and humanely with persons with dementing illness. Case examples are used in the chapters on psychological/behavioral and drug management to indicate practical approaches to maintaining patients at their optimal level of function. The book also reviews legal and ethical issues in the care of persons with dementing illness and shows how clinicians and caregivers how to mobilize community resources. In the 21st century, there is hope that advances in understanding dementing illnesses such as Alzheimer's disease will lead to their effective treatment, and ultimately to their prevention. Until then, clinicians, families, and society will continue to be faced with the challenges posed by these illnesse - making this book of interest for physicians and other health care professionals, whether in training, in practice, or engaged in clinical research.