What is MCI?
Mild cognitive impairment (MCI) is often described as being in- between normal aging and dementia, hence being “stuck in the middle”. Like dementia, cognitive decline is present, though not as severe. Like normal aging, people with MCI remain independent in managing daily responsibilities, such as doing the shopping, managing their schedule, and getting around town on their own (though little chinks in the armor so to speak may be present, a subject of a future posting).
A brief definition would be: MCI refers to a decline in thinking abilities, often involving memory, which is greater than expected for normal aging but not severe enough to interfere with a person’s ability to manage their daily activities.
The difference betwen normal aging, MCI, and dementia
How is MCI diagnosed?
Dr. Ronald Petersen and his colleagues were the first to propose a set of criteria for MCI diagnosis. These criteria are based on behavioral changes and cognitive changes. Behavioral changes might include making more everyday memory slips than is typical for you, such as forgetting to take out the trash or to pay a bill. Cognitive changes would involve evidence of poorer than expected performance, based on your age and education, on a test of cognitive ability. There are no medical tests, like a blood test, that can definitively diagnose MCI. It is a cognitive disorder. If you go on the Mayo Clinic’s website www.mayoclinic.com/health/mild-cognitive-impairment/DS00553 you will see further explanations.
The general criteria for diagnosing MCI are:
There are different types of MCI and we will drill down into subtypes and the diseases that may be behind these subtypes in future postings. For now, I’ll just point out that there are amnestic (meaning memory decline is present) and non-amnestic (meaning memory decline is not present) forms of MCI. In our clinic we most commonly see amnestic forms of MCI and the most commonly suspected cause is Alzheimer’s disease.
Signs and symptoms of MCI
Older adults with MCI make the same kinds of memory slips anyone would, such as going into a room and forgetting what you went there for. One of the differences is when you have MCI you make more slips than you used to or you may find you have to put a lot more effort into ensuring you don’t make the slips.
There are warning signs similar, though perhaps not as pronounced, as the examples provided by Dr. Troyer in her last posting under the heading “What’s not normal?” Examples of warning signs for MCI might include:
If someone is experiencing these warning signs it is a good idea for them to discuss this with their family doctor. The family doctor can help rule out other potential causes of the problems, help monitor symptoms over time, and refer on to a specialist if further investigation is indicated. In my next positing I will talk about what you can specifically do, in terms of next steps, if you are worried you may have MCI.