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Alzheimer’s disease and related dementias

Young women laughing with an older women while holding a cup of tea.

Alzheimer's is a type of dementia that causes problems with memory, thinking and behavior. Symptoms usually develop slowly and get worse over time. In time, they hinder daily tasks.

Alzheimer's is the most common form of dementia, and it accounts for 50 to 80 percent of cases of dementia. Dementia is a general term for a decline in mental ability severe enough to interfere with a person’s daily life. Other forms of dementia include vascular dementia, Lewy body dementia, Pick’s disease and Parkinson’s disease. This information focuses on Alzheimer’s disease, the most common type of dementia. This information can apply to any form of dementia, however.

Learn more about Alzheimer's disease and other types of dementia

Alzheimer's is not a normal part of aging. But the greatest known risk factor is age. Most people with Alzheimer's are 65 and older. But up to 5 percent of people with the disease have younger-onset Alzheimer's. Younger-onset often appears between age 40 and 60.

Learn more about younger-onset Alzheimer’s

Alzheimer's worsens over time. Memory loss is mild in the early stages. In the late stage, individuals cannot carry on a conversation or respond. Alzheimer's is the sixth-leading cause of death in the United States. Those with Alzheimer's live an average of eight years after symptoms begin. Survival can range from four to 20 years.

Learn about the 10 signs of Alzheimer’s

Alzheimer's has no current cure. But treatments can help, and research continues. Current Alzheimer's treatments cannot stop the disease from getting worse. But they can slow dementia’s symptoms for a while and improve quality of life for both those with Alzheimer's and their caregivers. Researchers around the world are now seeking better ways to treat the disease, delay its onset and prevent it.

Links to Oregon Alzheimer's resources

Alzheimer’s Association Oregon Chapter
1-800-272-3900 (24/7 helpline)

The Alzheimer’s Association Oregon Chapter educates and supports people when they are diagnosed. It also supports their families and caregivers. The Oregon Chapter has offices in Portland, Bend, Medford and Eugene. The chapter provides: Information and resources; A 24/7 telephone help line; Local support groups and education; An annual caregiver conference; A nationwide identification program, MedicAlert + Safe Return, for people who may wander and get lost.

Alzheimer’s Network of Oregon

The Alzheimer's Network provides compassionate support, education and outreach to those affected by Alzheimer's disease and other dementias. The Alzheimer’s Network serves Marion and Polk counties.

OHSU Layton Aging and Alzheimer’s Disease Center

The C. Rex & Ruth H. Layton Aging & Alzheimer’s Disease Center is a research, clinical care and education center, part of the Oregon Brain Institute at Oregon Health & Science University. Layton Center researchers investigate causes of and treatments for Alzheimer’s disease and related disorders, as well as measures of healthy aging. It is one of 31 National Institutes of Health (NIH) Alzheimer’s disease centers, and the only one in Oregon. Informed by leading-edge research, Layton Center clinicians have provided expert diagnosis and care to Northwest patients and families for over 20 years. New patients are accepted by referral from primary care neurologists. We are currently seeking volunteers including caregivers interested in participating in research studies. Call 503-494-7647 or email for information. Here is our website.

Find Alzheimer’s resources in your local area.

Connect with your local ADRC.

ADRC of Oregon staff are available to help you explore your options to meet your current needs or create a plan for the future.

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Understanding Memory Loss

A helpful guide from the National Institute on Aging.

English Spanish

Concerned about Dementia?

This printable tool includes information about the ten signs of dementia, rights of people with dementia, and other helpful information and resources.


After a Dementia Diagnosis: What next?

This printable tool provides information about important considerations and next steps for people with a dementia diagnosis.


Cognitive impairment screening

This printable tool provides a clinical roadmap for the cognitive impairment screening process.


National Alzheimer’s information

A free government source of information about Alzheimer's disease and related dementias.

English Spanish

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