Return to Index

Conditions InDepth: Alzheimer Disease

Main Page Risk Factors Symptoms Diagnosis Treatment Screening Reducing Your Risk Talking to Your Doctor Living With Alzheimer Disease Resource Guide

Alzheimer disease is a disorder of the brain. It leads to a loss of the ability to think, reason, and remember. Symptoms can change from day to day, but over time the disease worsens. Alzheimer dementia is when a person is no longer to care for him or herself.

Areas of the Brain Affected by Alzheimer Disease

Causes

The cause is not clear. Brain cells stop working and begin to die. It may be due to a mix of genes, environment, and overall health.

Two known things that play a role are:

Neurofibrillary tangles —twisted fibers of a protein called tau fibers inside nerve cells
Neuritic plaques —a protein called beta amyloid builds up between nerve cells

These changes often begin in areas of the brain that store memory. This damage may start several years before the first symptoms appear.

What are the risk factors for Alzheimer disease?What are the symptoms of Alzheimer disease?How is Alzheimer disease diagnosed?What are the treatments for Alzheimer disease?Are there screening tests for Alzheimer disease?How can I reduce my risk of Alzheimer disease?What questions should I ask my doctor?What is it like to live with Alzheimer disease?Where can I get more information about Alzheimer disease?

References

Alzheimer dementia. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/alzheimer-dementia. Updated August 9, 2019. Accessed October 8, 2019.

Alzheimer's disease medications fact sheet. National Institute on Aging website. Available at: https://www.nia.nih.gov/alzheimers/publication/alzheimers-disease-medications-fact-sheet. Updated April 2, 2018. Accessed October 8, 2019.

Atri A. The Alzheimer's Disease Clinical Spectrum: Diagnosis and Management. Med Clin North Am. 2019 Mar;103(2):263-293.

What is Alzheimer's? Alzheimer’s Association website. Available at: http://www.alz.org/alzheimers%5Fdisease%5Fwhat%5Fis%5Falzheimers.asp. Accessed October 8, 2019.

Revision Information

Reviewer: EBSCO Medical Review Board Rimas Lukas, MD
Review Date: 09/2019
Update Date: 10/08/2019

EBSCO Information Services is fully accredited by URAC. URAC is an independent, nonprofit health care accrediting organization dedicated to promoting health care quality through accreditation, certification and commendation.

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.