1. Alzheimer's disease  (Trust Mark: Doctor-Reviewed)
Alzheimer's disease (AD), one form of dementia, is a progressive, degenerative brain disease. It affects memory, thinking, and behavior. Memory impairment is a necessary feature for the diagnosis of this or any type of dementia. Change in one of t...• Reviewer: Luc Jasmin, MD, PhD, Departments of Anatomy & Neurological Surgery, University of California, San Francisco, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Alzheimer's disease  (Trust Mark: Doctor-Reviewed)
Alzheimer's disease, or AD, is a progressive, incurable disease of the brain caused by the degeneration and eventual death of neurons (nerve cells) in several areas of the brain.• Author: Rebecca J. Frey Ph.D.