We Value Your Privacy

We and our partners use technology such as cookies on our site to personalise content and ads, provide social media features, and analyse our traffic. Click below to consent to the use of this technology across the web. You can change your mind and change your consent choices at anytime by returning to this site.

Update Consent
Loading ...

Intellectual Effects of Alzheimer's Disease

Updated February 21, 2019

Alzheimer's disease is a progressive disorder that attacks the brain's nerve cells, causing intellectual decline. Alzheimer's is the most common cause of dementia for those over the age of 65.

Loading ...


Staging of the intellectual effects of Alzheimer's disease range from Stage 1, with no impairment, to Stage 7, with very severe cognitive decline. According to the Alzheimer's Association, Stage 3 is when early-stage Alzheimer's can be diagnosed. Memory and concentration deficits become apparent during clinical testing by this phase.

Early Signs

According to the Mayo Clinic, some of the early signs of the intellectual effects of Alzheimer's disease may include the repetition of things, putting items in illogical locations and forgetting the location, difficulty balancing the checkbook and difficulty expressing thoughts.


In Stage 4, people have decreased knowledge of recent events. By Stage 5, they may be unable to recall past events, such as the name of their high school. Times, dates and events become confused.

Final Stages

By the time Alzheimer's disease has reached Stage 6, it becomes difficult for a person to remember the names of family members. Stage 7 leaves the individual unable to respond or speak. Assistance is needed for all activities of daily living.

Life Expectancy

There is no cure for Alzheimer's disease. According to the Alzheimer's Foundation of America, the life expectancy ranges from eight to 10 years from diagnosis.

Loading ...

About the Author

Norene Anderson has been a writer since 2003. She is also a registered nurse with expertise in a wide range of medical conditions and treatments. Anderson received her associate degree in nursing from Lincoln University in Jefferson City, Mo.

Loading ...