Mild Cognitive Impairment (MCI) is a decline in cognitive function that may include compromised memory, language, or critical thinking. It is considered more serious than expected age-related decline but less serious and concerning than dementia. Some cases of MCI proceed to dementia and some do not, making such impairment especially alarming for some who experience it. A person with symptoms of impairment might begin losing items, for example, or forget scheduled appointments.| Psychology Today
Dementia is a progressive loss of cognitive function, marked by memory problems, trouble communicating, impaired judgment, and confused thinking. Dementia most often occurs around age 65 and older but is a more severe form of decline than normal aging. People who develop dementia may lose the ability to regulate their emotions, especially anger, and their personalities may change.| Psychology Today