Dementias are brain disorders that impair memory, thinking, behavior, and physical activity. Alzheimer's disease is the most common form, affecting 50 to 60 percent of dementia patients, and yet the exact cause of Alzheimer's and how best to detect it early remain unknown. Alzheimer's Disease and Other Dementias, Second Edition provides helpful clarification of this group of diseases and their specific types. It explains how to recognize the symptoms of dementia or Alzheimer's disease, how these disorders are diagnosed, the latest theories about their cause, and how they can be treated. Also covered are the outlook for future prevention and treatment and resources providing further information for those seeking help coping with dementia.