Understanding Mild Cognitive Impairment (MCI)

We often hear from family members who have come across the term “mild cognitive impairment” or “MCI” and wonder what it really means. Perhaps a loved one, or someone you know has been diagnosed with MCI. That’s why it’s important to have a basic understanding of what MCI is and how it can impact your daily life and family.

What is Mild Cognitive Impairment (MCI)?

Mild cognitive impairment (MCI) is a condition in which a person experiences noticeable changes in memory, thinking, or reasoning that are greater than expected with normal aging. These changes may affect tasks such as paying bills, remembering appointments, staying organized, making decisions, or recognizing potential hazards and risks. Despite the limitations, many individuals with MCI are generally still able to live independently and manage their daily responsibilities.

MCI does not always worsen over time. In some cases, symptoms remain stable or even improve. However, it can increase the likelihood of developing dementia, including Alzheimer's disease and other disorders that affect brain function.

The Mayo Clinic, Alzheimer's Association, and the National Institute on Aging (NIA) have published a wealth of information on MCI. We’ve summarized it into a list of five frequently asked questions below:

What are the different types of MCI?
MCI is typically classified into two categories:

• Amnestic MCI: Primarily affects memory and recall of information.
• Non-amnestic MCI: Mainly impacts thinking abilities such as judgment, problem-solving, planning, and decision-making.

What are the signs and symptoms of MCI?
An individual with MCI may experience:

• Increased forgetfulness
• Difficulty concentrating or staying focused
• Trouble finding the right words during conversations
• Problems with planning or organizing tasks
• Challenges with judgment or decision-making
• Missing appointments, deadlines, or bill payments
• Frequently misplacing personal items
• In some cases, changes in movement, balance, or sense of smell

What are some of the causes and risk factors of developing MCI?
MCI is associated with changes in brain regions involved in memory and thinking. It may occur as part of the early stages of certain neurological conditions, including Alzheimer's disease, Parkinson's disease, Lewy body dementia, frontotemporal dementia, and vascular dementia. Factors that may increase the risk of developing MCI include:

• Age 65 or older
• A family history of dementia
• Certain genetic factors, such as the APOE4 gene variant
• Brain injuries or neurological disorders
• Cardiovascular conditions, including high blood pressure, high cholesterol, and stroke
• Chronic illnesses such as diabetes
• Depression, anxiety, or other mental health conditions
• Vitamin deficiencies, thyroid disorders, or dehydration
• Sleep disorders, particularly sleep apnea
• Some types of antihistamines, antidepressants, sedatives, muscle relaxants, seizure medications, and opioid pain relievers

How is MCI diagnosed?
There is no single test that can confirm MCI. Healthcare providers typically use a combination of evaluations to assess cognitive function and rule out other possible causes of symptoms. These may include:

• Medical and neurological examinations
• Review of medical history and medications
• Cognitive and memory assessments
• Blood and urine testing
• Brain imaging, such as MRI or CT scans
• If needed, neuropsychological evaluations or lumbar puncture
• Input from family members or caregivers

Are there special treatments and ways of managing MCI?
Yes! Most treatments focus on addressing underlying causes and supporting brain health. Depending on the situation, recommendations may include:

• Adjusting medications that may affect cognition
• Treating contributing conditions such as depression, sleep apnea, or vitamin deficiencies
• Managing cardiovascular and other health risks
• Participating in mentally stimulating activities and social engagement
• Making lifestyle changes that support overall brain health
• Improving home safety and daily routines
• Exploring clinical trial opportunities when available

Gaining a better understanding of the cognitive changes associated with MCI can help you and your family recognize potential warning signs and know when to seek medical evaluation. It’s also wise to discuss healthcare preferences and future care wishes with loved ones and complete advance care planning documents. Taking these steps early can help ensure that important decisions reflect your values and goals.

Finally, it is important to remember that, while MCI can affect memory and thinking skills, it does not always progress to dementia. Many people with MCI continue to live active, independent lives. Staying physically active, mentally engaged, and socially connected may support overall cognitive health and quality of life. By learning about MCI and planning ahead, you and your family can approach the future with greater confidence, preparedness, and peace of mind.