Families should know that dementia isn’t a single ailment but an umbrella term for multiple conditions that can affect a person’s memory, thinking, and daily functioning. Dementia is a progressive neurological condition driven by four main subtypes: Alzheimer’s disease, vascular dementia, Lewy body dementia, and frontotemporal dementia. While memory loss is the hallmark sign of the most common form (Alzheimer’s, which accounts for 60–80% of cases), non-Alzheimer’s dementias exhibit somewhat different symptoms during their early stages of progression, including issues with behavior, language, movement, or executive judgment.
Getting a loved one diagnosed at the right time is key for families to choose the right care option, given the progressive nature of the disease. While only a healthcare professional can determine an individual’s dementia type after ruling out other possible causes of similar symptoms, families should also understand the details of common dementia types to know what can be managed at home and when it’s time to seek professional dementia care.
In this blog, we will cover what different types of dementia look like and how they affect an individual’s daily living and quality of life.
What ‘Dementia’ Really Means (Umbrella Term vs. Diagnosis)
Dementia isn’t what people typically think it is—a specific, single disease that causes severe memory loss as a normal and inevitable part of getting older. But that understanding is inaccurate in several ways. Dementia is a general, overarching term for a group of cognitive symptoms that interfere with an individual’s daily life, not a single specific disease.
Let’s look at how this condition compares with related age-related ailments and how a diagnosis helps.
Dementia vs. Normal Age-Related Forgetfulness
While both dementia and normal age-related forgetfulness cause memory lapses, they differ in how they impact memory. An age-related memory lapse includes forgetting a name or word occasionally but remembering it later. On the other hand, dementia can cause an individual to forget recently learned information or repeat the same questions again and again. A person with normal age-related forgetfulness may have a slower processing speed but will recognize their own forgetfulness. But dementia causes a person to feel disoriented in daily life, struggle with communication, and exhibit behavioral challenges.
Conditions That Mimic Dementia and Can Be Reversed
Many medical conditions can be mistaken for dementia. So why or how can certain conditions be mistaken for dementia? It’s due to the common dementia-like symptoms—such as memory loss, confusion, and behavioral changes—that these medical conditions share. While medical ailments might be causing issues related to memory loss, confusion, or sluggish thinking, a family may mistake them for signs of dementia, which is why a diagnosis is important.
So what conditions look like dementia but aren’t? Here are the details:
- Vitamin Deficiencies
- Thyroid Disorders
- Depression
- Medication Side Effects
- Infections
- Sleep Disorders
- Normal Pressure Hydrocephalus (NPH)
Alzheimer’s Disease
Alzheimer’s disease is the most common type of dementia, as it accounts for 60% to 80% of the cases. Alzheimer’s disease is a progressive brain disorder that slowly destroys memory, thinking skills, and the ability to carry out simple daily tasks. It mostly affects older adults aged 65 and older. But is Alzheimer’s the same as dementia? No, it isn’t. While both Alzheimer’s and dementia are closely related, they aren’t the same.
The Early Signs Families Notice First
Long before a formal diagnosis, families often notice early signs.
Here are the signs a family notices first:
- Short-Term Memory Loss: Forgetting recent conversations, names, or newly learned information.
- Trouble With Familiar Tasks: Struggling to complete routine tasks like cooking.
- Communication Changes: Pausing mid-sentence, struggling to find the right words, or losing track of conversations.
- Misplacing Items: Leaving items in unusual spots and being unable to retrace them.
- Confusion With Time or Place: Losing track of dates, seasons, and feeling disoriented.
- Poor Judgment: Making unreasonable decisions regarding money, hygiene, or personal safety.
- Mood and Personality Shifts: Showing increased anxiety, irritability, depression, or withdrawing from social activities.
How It Typically Progresses
Alzheimer’s disease typically progresses through three broad stages—early (mild), middle (moderate), and late (severe)—as influenced by the gradual buildup of amyloid plaques and tau tangles in the brain. The timeline spans 4 to 20 years. During the early stage, families first notice mild forgetfulness, such as repeating questions, misplacing items, trouble managing money, and slight personality shifts. In the middle stage, memory and thinking problems start affecting daily life, and a diagnosis is made.
An early diagnosis allows the individual to take the necessary steps in legal and financial planning. Likewise, families can take proactive steps toward home safety adaptations and consider long-term care planning.
Vascular Dementia
It’s the second most common type of dementia that accounts for around 15-20% of the total dementia cases. This type of dementia causes a gradual decline in thinking skills because conditions block or reduce blood flow and oxygen to the brain. Common vascular dementia symptoms include cognitive difficulties, memory issues, mood and behavior shifts, and physical changes like unsteady walking, poor balance, or trouble controlling urination. This dementia has further subtypes—multi-infarct dementia, subcortical vascular dementia, and stroke-related dementia—all of which are related to reduced or blocked blood supply to the brain.
The Stroke and Heart-Health Connection
The brain uses 20% of the body’s oxygen and energy. A healthy heart pumps this vital blood through clear vessels. Vascular damage caused by heart disease, high blood pressure, and narrow arteries can reduce proper circulation, which harms the delicate blood vessels in the brain and can trigger vascular dementia. A major stroke or a series of small, silent strokes may also block blood flow and can directly trigger vascular dementia.
Why Symptoms Can Change in Steps, Not a Slope
Vascular dementia symptoms often progress in distinct steps or a “staircase” pattern rather than a smooth, continuous downward slope, as the condition is directly linked to discrete vascular events like strokes or mini-strokes.
Given the sudden nature of the condition, families should set up powers of attorney, healthcare proxies, and financial plans early, during stable plateaus. Managing underlying health risks like high blood pressure, diabetes, and high cholesterol is important, as it can prevent the next “step” down.
Lewy Body Dementia
Dementia with Lewy bodies (DLB) is another progressive brain disorder caused by abnormal protein deposits that affect one’s thinking, movements, behavior, and mood. Clumps of a protein called Lewy bodies build up inside nerve cells and cause them to die. The symptoms caused by this type of dementia overlap with those of Alzheimer’s disease and Parkinson’s disease. On average, 1 out of 10 people with dementia has DLB.
Hallucinations, Movement Changes, and Sleep Disturbance
Core symptoms of Lewy body dementia include cognitive fluctuations, visual hallucinations, movement changes, and sleep disturbances. This means the individual experiences unpredictable changes in concentration, attention, and alertness, often tied to seeing things that are not there.
Among these, the symptoms a family notices first include subtle sleep disruptions (like acting out dreams), sudden shifts in attention, unexplained balance issues, or vivid visual hallucinations rather than typical memory loss.
Because of this, they need to proactively make safety modifications, consult a psychiatrist regarding the use of antipsychotic drugs, promote flexible routines, and plan for a long-term care option.
Frontotemporal Dementia
Frontotemporal dementia (FTD) is another neurodegenerative disease that deteriorates the frontal and temporal lobes. It commonly affects people at a younger age than Alzheimer’s disease, typically between 40 and 65. The symptoms an individual faces depend on which part of the brain is damaged or shrinks. What’s different about this type of dementia is that memory loss is rarely an early sign. It has three core types—Behavioral Variant FTD (bvFTD), Primary Progressive Aphasia (PPA), and Movement Disorders. This dementia type is also caused by abnormal protein clumps that destroy brain neurons. Around 10% to 30% of cases have a genetic link.
When Personality and Language Change Before Memory
Frontotemporal dementia (FTD) brings changes in personality, behavior, or language long before memory is affected. A polite person may become blunt, socially inappropriate, reckless, or impulsive. They may start caring about hobbies or show a complete lack of emotional warmth. They may struggle to name everyday objects or may hesitate during speech.
As their memory remains intact, the family often mistakes these early signs for a midlife crisis, depression, stress, or a psychiatric issue. Recognizing these symptoms early helps the family plan for future care. plan for future care. They can consider legal and financial protection, safety management, and specialized care resources equipped for behavioral variant FTD.
Mixed Dementia
Mixed dementia occurs when a person has brain changes from two or more types of dementia at the same time, most commonly seen as a combination of Alzheimer’s disease and vascular dementia.
Here are the common symptoms a family notices first:
- Memory Lapses: Forgetting recent conversations, repeating the same questions, or misplacing everyday items.
- Planning and Focus Issues: Trouble paying bills, managing money, or following a recipe. This is called executive dysfunction, which means trouble with organizing and problem-solving.
- Slowed Thinking: Taking much longer to respond to questions or complete daily tasks.
- Physical or Behavioral Changes: Mild balance problems, slow walking, or sudden mood swings and irritability.
Because symptoms do not follow a straight line and the individual may have both cognitive and physical safety needs (e.g., memory loss and physical safety), the decline is usually unpredictable. Therefore, families should update legal documents, medical proxies, and financial plans as early as possible. Also, professional help can help them identify underlying causes. This way, the family can build a specialized care team that understands both cognitive and physical support needs.
FAQ
- What are the four most common types of dementia?
The four most common types of dementia are Alzheimer’s disease, vascular dementia, Lewy body dementia, and frontotemporal dementia.
- What is the difference between vascular dementia and Alzheimer’s?
Key differences between vascular dementia and Alzheimer’s are based on their underlying causes, early symptoms, and onset and progression. Abnormal protein buildups in the brain cause Alzheimer’s, whereas vascular dementia is caused by reduced or blocked blood flow to the brain. Alzheimer’s begins with subtle short-term memory loss, whereas vascular dementia shows symptoms including slowed thinking, trouble with planning, and poor decision-making. Alzheimer’s symptoms generally worsen gradually and steadily, while vascular dementia symptoms can appear out of nowhere after a stroke or progress in a stepwise manner.
- Can a person have more than one type of dementia at once?
Yes, and this condition is known as mixed dementia. The most frequent pairing is Alzheimer’s disease combined with vascular dementia.
- Which types of dementia progress the fastest?
Rapidly progressive dementias (RPDs) progress the fastest, causing severe cognitive and physical decline within weeks to months rather than years.
- What should I ask at a neurology appointment?
A person with noticeable dementia symptoms should ask the neurologist about the specific type and stage of dementia, available treatments, and safety adjustments for daily life.
Willow Falls—Memory Care Community That Supports All-Around Wellness
At Willow Falls, we understand that while dementia’s progression can’t be stopped, it can surely be managed with the right approach and care. We empower families to see a dementia diagnosis as a starting point, not a final plan. While Alzheimer’s is the most common among all the types of dementia, other types of dementia also exist that can develop in people as they age.
The key to ensuring your loved one receives the right treatment at the right time is getting an early diagnosis, as soon as symptoms begin to show. Early diagnosis will allow your loved one to receive the comprehensive care needed to help slow cognitive decline.
At Willow Falls, we offer holistic memory care services to residents at stages of dementia. Whether your loved one’s struggling with Alzheimer’s, vascular, Lewy body, or frontotemporal dementia, we’ve got our professional on-site staff to deliver compassionate and tailored care. Contact us today and talk with our Willow Falls memory care team in Crest Hill about what your loved one’s specific diagnosis means day to day. Schedule a tour to learn about the amenities and services we offer on-site before choosing us as your loved one’s new home.