Preclinical stages of Alzheimer’s disease are a period in which a person has no signs or symptoms or has only subjective symptoms, such as mild memory loss. Doctors may be able to identify certain markers that indicate possible development of Alzheimer’s disease, but many people with these markers will not go on to develop the disease.
The prodromal stage involves mild cognitive impairment or decline. A person may notice that they forget things more often, have trouble finding the right words, or forget about appointments or bills.
A person displaying these signs may go on to develop dementia, stay the same, or improve.