Types of Alzheimer’s Disease

Medically Reviewed by Dr. K on 18 March 2021

Types of Alzheimer's Disease

Memory failure, frustration, discomfort with once-familiar activities, and difficulty making choices are also typical signs of Alzheimer's disease. Although the exact cause of Alzheimer's disease is unknown, all types of the disease tend to have an overproduction and/or reduced clearance of a protein called amyloid-beta peptides. Though the symptoms are identical, there are two major forms of the condition.

Early-onset Alzheimer's.

This is a kind that affects people under the age of 65. When they're afflicted with the condition, they're usually in their 40s or 50s. Early-onset Alzheimer's affects up to 5% of all Alzheimer's patients. It is more common in people with Down syndrome.

Early-onset Alzheimer's varies from other forms of the disorder in a few areas, according to experts. People who develop it have more brain changes consistent with Alzheimer's disorder.

The early-onset variant seems to be due to a mutation in chromosome 14, a section of a person's DNA. Myoclonus, a form of muscle twitching and spasm, is even more frequent in people with early-onset Alzheimer's.

Familial Alzheimer's disease (FAD) is a form of Alzheimer's disease which has been connected to genetics by doctors. At least two generations of members of affected households have had the disorder. FAD accounts for fewer than 1% of all Alzheimer's cases. FAD is present in the majority of patients with early-onset Alzheimer's disease.


Late-onset Alzheimer's.

This is the most prevalent form of dementia, which affects individuals aged 65 and over. It could run in families or not. Researchers are yet to discover a specific gene that produces it. Nobody understands that some individuals understand it and others do not.


Referenced on 2.3.2021:

  1. Alzheimer's Association.
  2. https://www.webmd.com/alzheimers/guide/alzheimers-types

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