Dementia: Types, Symptoms, and Treatment Options

Dementia is one of the most significant health challenges facing older adults and their families. Globally, an estimated 57 million people were living with dementia in 2021, and nearly 10 million new cases are diagnosed each year. While dementia is often associated with memory loss, it can also affect thinking, behavior, communication, independence, and quality of life.

Our experts at Private Health Management (PHM) help patients and families understand what symptoms may mean, how dementia is diagnosed, what treatment options are available, and how to plan for care over time. In this article, we explain what dementia is, how it is diagnosed and treated, and what patients and caregivers can do to support brain health and quality of life.

What is Dementia?

Dementia is a condition that causes a gradual decline in memory, thinking, behavior, and the ability to carry out everyday activities. It is not a single disease but a group of disorders that affect the brain. Alzheimer’s disease is the most common type of dementia. As dementia progresses, people become less able to live independently and often need increasing support from caregivers.

Dementia is one of the most significant health challenges facing older adults today. Rather than being a single disease, dementia is a group of conditions that affect memory, thinking, behavior, and the ability to carry out everyday tasks. Alzheimer’s disease is the most common form, but several other disorders can also lead to dementia¹. As these conditions progress, people gradually lose their independence and require increasing levels of support from family members and caregivers.

What makes dementia particularly challenging is that it develops slowly. Changes in the brain can begin many years before symptoms become noticeable. Many people first experience Mild Cognitive Impairment (MCI), where memory or thinking problems are present but daily life is still mostly unaffected². By the time memory problems appear, the underlying disease process is often already well underway. As a result, researchers have increasingly focused on identifying dementia earlier and finding ways to slow its progression.

Dementia is diagnosed when these problems begin to interfere with normal activities.

There are three main stages of dementia:

• Mild dementia: People may forget recent events, have trouble finding words, or struggle with planning and organization.
• Moderate dementia: Memory loss becomes more severe. People may become confused about time or place, repeat questions, or need help with daily activities.
• Severe dementia: Individuals may lose the ability to communicate clearly, recognize loved ones, walk independently, or care for themselves.

Many people also experience behavioral symptoms such as anxiety, depression, agitation, hallucinations, sleep problems, or personality changes. These symptoms can be stressful for both patients and caregivers.

Major Types of Dementia

• Alzheimer’s disease (AD) is the most common form of dementia. It is linked to abnormal protein buildup in the brain and usually begins with memory loss³.
• Vascular dementia is caused by reduced blood flow to the brain, often due to strokes or damage to blood vessels. People commonly experience problems with planning, decision-making, and processing information⁴.
• Dementia with Lewy Bodies (DLB) is associated with abnormal protein deposits called Lewy bodies. Common symptoms include visual hallucinations, sleep disturbances, and movement problems similar to Parkinson’s disease⁵.
• Parkinson’s Disease Dementia (PDD) develops in some people who have had Parkinson’s disease for several years and mainly affects attention, thinking speed, and problem-solving abilities⁶.
• Frontotemporal Dementia (FTD) usually affects younger adults than other forms of dementia. It often causes changes in personality, behavior, and language before memory problems appear⁷.

How Dementia Is Diagnosed

Doctors diagnose dementia using several tools. They collect information about symptoms, medical history, and changes in daily functioning. Family members are often asked to describe changes they have noticed⁸.

A physical and neurological examination helps identify movement problems, balance issues, or signs of stroke. Cognitive tests such as the Mini-Mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) measure memory, attention, language, and problem-solving skills⁸.

Brain scans such as MRI and PET imaging can show changes in brain structure or detect the abnormal proteins linked to Alzheimer’s disease⁹. One of the biggest changes in the field has been the development of biomarkers. Blood tests and spinal fluid tests can now detect biological signs of Alzheimer’s disease before severe symptoms appear. Among these, plasma p-tau217¹⁰ and the ratio of amyloid Aβ42/40 have emerged as the most promising tools for identifying Alzheimer’s-related brain changes and predicting future cognitive decline. Other important biomarkers are also emerging to help identify other dementias more accurately (e.g. DATScan, skin biopsy).

Conditions That Can Mimic Dementia

Not all memory problems are caused by dementia. Some conditions can cause similar symptoms and may be treatable. These include:

• Vitamin B12 deficiency
• Thyroid disorders
• Normal Pressure Hydrocephalus (NPH)
• Depression
• Side effects from medications

Doctors must also distinguish dementia from delirium, a sudden state of confusion often caused by illness, infection, dehydration, or medication problems. Unlike dementia, delirium is usually reversible when the underlying cause is treated.

Current Treatments

There is currently no cure for most forms of dementia, but treatments can help manage symptoms and slow disease progression.

Common medications include:

Donepezil, rivastigmine, and galantamine, which help improve communication between brain cells. Memantine helps regulate brain signaling and may improve memory and thinking in later stages⁸.

Newer treatments, including lecanemab (Leqembi)¹¹ and donanemab (Kisunla)¹², target the amyloid proteins linked to Alzheimer’s disease. Research shows these drugs can slow cognitive decline in some patients with early-stage Alzheimer’s disease. However, they require careful monitoring because they may cause brain swelling or bleeding in some individuals.

Prevention and Healthy Lifestyle Choices

Research suggests that many dementia cases may be delayed or prevented by addressing risk factors throughout life. The 2024 Lancet Commission identified 14 modifiable risk factors, including hearing loss, high cholesterol, high blood pressure, smoking, obesity, diabetes, physical inactivity, social isolation, and untreated vision loss¹³.

Healthy habits that may reduce risk include^14,15:

• Regular physical exercise
• Maintaining a healthy weight
• Managing blood pressure and cholesterol
• Staying socially active
• Protecting hearing and vision
• Avoiding smoking and excessive alcohol use

The MIND diet, which combines elements of the Mediterranean and DASH diets, has been linked to a lower risk of dementia. This diet emphasizes vegetables, berries, whole grains, nuts, fish, and olive oil.

Supporting Patients and Caregivers

As dementia progresses, changes in the home can improve safety and quality of life. These may include removing tripping hazards, using calendars and reminders, installing safety devices, and ensuring proper nutrition and hydration.

Caregivers play a critical role but often experience stress and burnout. Support groups, respite care, and caregiver education programs can help families manage the challenges of dementia care. Early legal and financial planning is also important so that patients can participate in decisions about their future while they are still able to do so.

Overall, dementia is a complex condition that affects millions of people worldwide. Advances in blood tests, brain imaging, and new medications are improving the ability to diagnose and treat dementia earlier than ever before. Although there is still no cure, a combination of medical treatment, healthy lifestyle choices, caregiver support, and early planning can help people with dementia maintain their quality of life for as long as possible.

Because dementia care can be difficult to navigate, PHM experts can help patients and families understand diagnostic options, evaluate appropriate treatments, coordinate specialist care, and plan for changing needs over time.