Types of Alzheimer's disease
There are two distinct types of Alzheimer's disease: early-onset and late-onset.
Early-onset Alzheimer's disease
Early-onset Alzheimer's:
- Signs often appear in a person's mid-30s to mid-60s.
- Is a rare form of the disease, mostly caused by a gene passed from parent to child.
- Progresses faster than the late-onset form of the disease.
Late-onset Alzheimer's disease
- Most people with Alzheimer's have this form of the disease.
- Signs often appear in a person's mid-60s or later.
- Doctors aren't always sure what causes this type.
Late-onset Alzheimer's disease stages
There are three basic stages of late-onset Alzheimer's. But, the disease doesn't always progress in a predictable way. Each person may experience different symptoms.
Early-stage (mild)
A person in the early stages of Alzheimer's can mostly still function on their own.
During early-stage Alzheimer's, they may:
- Have trouble remembering names or words.
- Have problems doing routine tasks.
- Forget what they just read.
- Lose or misplace objects.
- Have trouble managing time.
- Get lost in a familiar place.
Middle-stage (moderate)
The middle stage of Alzheimer's can last for years.
The symptoms become more noticeable and include:
- Getting easily frustrated or angry.
- Changes in personality.
- Forgetting events or things that happened in the past.
- Withdrawing from friends and family.
- Forgetting basic information like their address.
- Incontinence.
- Changes in sleep patterns.
- Compulsive behavior like pacing, tapping, or hand-wringing.
Late-stage (severe)
In the final stage of Alzheimer's, most people need round-the-clock care.
They may:
- Lose the ability to communicate.
- Lose mobility.
- Be susceptible to urinary tract and respiratory infections.
- Lose awareness of their surroundings.
- Not recognize loved ones.
What causes Alzheimer's disease?
Experts believe that a build-up of proteins around the brain causes Alzheimer's. These proteins form plaques around brain cells.
This process begins many years before symptoms appear.
It's unclear why some people get Alzheimer's and some don't. It may be a mix of genetic, lifestyle, and environmental factors.
Alzheimer's disease risk factors and complications
Doctors don't understand everything about what causes Alzheimer's.
But there are some risk factors that make it more likely you'll get it, such as:
- Being over 65.
- A family history of Alzheimer's.
- Having Down syndrome.
- Head injuries.
- Smoking.
- Obesity.
- High blood pressure.
- Diabetes.
- High cholesterol.
- Depression.
- Inactive lifestyle.
Alzheimer's disease prevention
The best way to lower your risk of Alzheimer's is to lead a healthy, active lifestyle.
- Stay connected socially.
- Eat a well-balanced, heart-healthy diet.
- Get exercise several times a week.
- Avoid head injuries by wearing a seat belt and helmet.
- Stay mentally active.
- Prioritize sleep.
- Quit smoking.
- Take up a challenging new hobby.