The Different Types of Dementia and How to Identify Them

Just as different heart conditions require different treatments, different types of dementia affect the brain in unique ways. Recognizing what causes each form distinct helps families seek the right care, anticipate progression, and find effective support.

When families first notice cognitive changes in a loved one, "dementia" is often the word they hear. However, dementia is not a single disease. It is an umbrella term for a wide range of symptoms that affect memory, thinking, and daily functioning.

Just as different heart conditions require different treatments, different types of dementia affect the brain in unique ways. Recognizing what causes each form distinct helps families seek the right care, anticipate progression, and find effective support.

Here is a breakdown of the five most common types of dementia and how they are typically identified.

1. Alzheimer’s Disease

Accounting for 60% to 80% of all cases, Alzheimer’s is by far the most common form of dementia. It is caused by the abnormal buildup of proteins (amyloid plaques and tau tangles) in the brain, which leads to the death of brain cells.

Early Signs & Identification:

• Difficulty remembering newly learned information or recent conversations (short-term memory loss is typically the earliest sign).

• Misplacing items in unusual places and being unable to retrace steps.

• Trouble handling complex tasks like managing finances, cooking familiar recipes, or keeping track of bills.

• Getting lost in familiar neighborhoods.

2. Vascular Dementia

Making up roughly 10% to 20% of cases, vascular dementia occurs when conditions block or reduce blood flow to the brain, often due to strokes, "mini-strokes" (TIAs), or chronic damage to blood vessels.

Early Signs & Identification:

• A progression that can feel more "step-like" than Alzheimer's—meaning a person might stay stable for a while, then experience a sudden drop in function after a vascular event.

• Greater difficulty with executive functioning (planning, judgment, problem-solving, and organization) rather than just pure memory loss.

• Slowed thinking, confusion, and trouble concentrating.

• Physical coordination issues or gait changes that reflect underlying cardiovascular or stroke-related impacts.

3. Dementia with Lewy Bodies (DLB)

Caused by microscopic deposits of abnormal protein (alpha-synuclein, called Lewy bodies) that affect chemical messengers in the brain. It shares symptoms with both Alzheimer's and Parkinson's disease.

Early Signs & Identification:

• Visual hallucinations: Seeing things, people, or animals that aren’t really there, often vividly.

• Fluctuating alertness: Marked shifts in attention and lucidity throughout the day—one minute a person is sharp and conversational, and the next they are deeply confused or staring blankly.

• Movement symptoms: Physical signs similar to Parkinson’s, such as muscle rigidity, tremors, slow movement, or frequent falls.

• Severe disturbances during rapid eye movement (REM) sleep, such as acting out dreams.

4. Frontotemporal Dementia (FTD)

FTD involves progressive damage to the frontal and temporal lobes of the brain, which control personality, behavior, and language. Unlike other forms, FTD frequently strikes at a younger age, often diagnosed between 45 and 64.

Early Signs & Identification:

• Profound personality and behavioral changes: A person may act out of character, display uncharacteristic impulsivity, lose social filter or empathy, or show a complete lack of concern for others (apathy).

• Language difficulties: Struggling to find the right words, misusing words, or losing the ability to speak and understand language (known as primary progressive aphasia).

• Less initial impact on day-to-day memory compared to behavioral shifts, which often leads to initial misdiagnoses like depression or mid-life stress.

5. Creutzfeldt-Jakob Disease (CJD)

A rare, rapidly progressive, and fatal neurodegenerative brain disorder caused by infectious, misfolded proteins called prions. Unlike other dementias that progress over years, CJD typically progresses over the course of months.

Early Signs & Identification:

• Sudden, rapid memory loss and severe mental confusion that worsens over weeks rather than years.

• Abrupt personality changes, severe depression, anxiety, or apathy.

• Neurological signs such as sudden jerky muscle movements (myoclonus), balance and coordination issues (ataxia), stiff limbs, or unexplained vision problems/hallucinations.

Why Accurate Identification Matters

Knowing the specific type of dementia changes everything from medical management to daily care strategies. For example, individuals with Lewy Body Dementia can experience severe, dangerous physical reactions to standard antipsychotic medications, and conditions like CJD require specialized palliative protocols due to their rapid timeline.

At Dove Estates, our specialized memory care team understands that no two residents experience cognitive change the exact same way. By utilizing advanced training—such as Teepa Snow’s Positive Approach to Care and NIDE guidelines—we look at the individual behind the diagnosis to tailor our support to their specific behavioral, emotional, and physical needs.

Have questions about a loved one's specific diagnosis or need guidance on what steps to take next? We are here to help.