7 Alzheimer's Disease Stages and Symptoms

  • Medical Author:
    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

  • Medical Editor: William C. Shiel Jr., MD, FACP, FACR
    William C. Shiel Jr., MD, FACP, FACR

    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Quick GuideA Caregiver's Guide to Alzheimer's Disease

A Caregiver's Guide to Alzheimer's Disease

What is Alzheimer's disease?

Alzheimer's disease (also termed Alzheimer disease) is a progressive mental deterioration that can occur in middle-aged individuals, but usually occurs in individuals that are about 60 to 65 years old or older. Early or younger onset Alzheimer’s can occur in individuals aged about 40 – 65. The disease is due to generalized deterioration of brain function related to plaques that develop in the brain tissue. The cause of Alzheimer's is unknown. Alzheimer's disease is the most common cause of premature senility. About 5.4 million Americans age 65 and older have Alzheimer's and approximately 200,000 individuals have younger or early onset Alzheimer's disease. Statisticians predict by 2050 about 13.8 to 16 million people will have Alzheimer’s disease. Continue Reading

Reviewed on 5/12/2016

Alzheimer's Association. Stages of Alzheimer's.

Anderson, H. "Alzheimer Disease." Medscape. Updated May 04, 2016.

Alzheimer's Association. "What is Alzheimer's?"

Reisberg, B. "Clinical stages of Alzheimer's." Fisher Center for Alzheimer's Research Foundation.


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2. Alzheimer's Disease Education and Referral Center, National Institute on Aging

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