Dementia Care · A Pillar Guide from Preferred Care at Home
Most people assume dementia is one disease that always starts with forgetfulness. It isn’t, and it doesn’t. This guide compares the four major types by first symptoms, walks through how diagnosis actually works, and explains what each type changes about daily support at home — drawn from over 40 years, across three generations, of helping families figure out what comes next.
Dementia is an umbrella term — it names the pattern of cognitive decline, not the disorder behind it. Per the NIA, four common types account for most diagnoses. Here is what that distinction answers.
No. It describes a group of symptoms — memory loss, changes in thinking, trouble with problem solving, shifts in language or personality — caused by different diseases that damage brain cells over time.
No. FTD often starts with personality, behavior, or language changes; Lewy body can begin with hallucinations, sleep disturbance, or movement changes. Memory-first is the most common pattern — but not the only one.
Only about 40–60% of people with dementia documented by testing or Medicare claims reported a diagnosis in national surveys, per the CDC — older people often go undiagnosed for years, especially when symptoms don’t fit the expected pattern.
The type affects how a person responds to routines, which safety concerns occur most, and which communication strategies work — supervision, safety, communication, and hallucination response all shift with the diagnosis.
01
Consistent routines, safety monitoring, medication reminders, and patience as short-term memory declines. It usually begins quietly — trouble paying bills or following a recipe — and unfolds gradually over years as amyloid plaques and tau proteins damage nerve cells.
02
Thinking slows, planning gets harder, and decline happens in steps — frequently tied to strokes. Care shifts toward fall prevention, a cardiovascular-friendly daily rhythm, and watching for signs of another vascular event rather than a fixed schedule.
03
Lewy body calls for a calm response plan — redirecting instead of correcting hallucinations — plus mobility support, knowing ability fluctuates morning to evening. FTD calls for behavior support, communication adjustments, and respite for family adjusting to personality change.
Mixed dementia — most often Alzheimer’s paired with vascular — is more common than many families realize, and part of why symptoms sometimes don’t fit one textbook pattern. Rarer causes include Parkinson’s disease dementia, normal pressure hydrocephalus (sometimes reversible), posterior cortical atrophy, and Creutzfeldt-Jakob disease.
Young onset dementia means any dementia diagnosed before 65 — FTD and Alzheimer’s are its most common causes. Younger people face delayed diagnosis and fewer age-appropriate support resources.
An alpha-synuclein assay proved 97% specific for detecting Lewy body pathology in research settings, per the NIH’s 2025 dementia research progress report — a sign of why differential diagnosis matters, and why it remains difficult without specialized evaluation.
A real evaluation usually involves several steps — and we often support Clarksville families while this process plays out.
A detailed history with primary care, including family history and the timing of the first changes — the pattern matters as much as the symptoms.
Memory, language, problem solving, and decision making — the profile of what’s affected points toward the type.
Medication side effects, vitamin deficiency, thyroid imbalance, or increased pressure in the brain — some causes are reversible.
MRI, CT, or PET to identify vascular damage or atrophy patterns — and to rule out other conditions.
Cerebrospinal fluid or newer blood-based Alzheimer’s biomarker tests in some cases — availability varies by location and doctor.
Preferred Care at Home has spent over 40 years, across three generations, helping families figure out what comes next — and families have relied on our Clarksville team without ever being asked to sign a long-term contract.
When dementia changes a person’s personality or introduces hallucinations, the right caregiver isn’t just whoever is available — they’re matched by personality to fit. That matching matters most with Lewy body and frontotemporal patterns.
For adult children in Montgomery or Robertson County who live out of state, our Transparency Room online portal offers visibility into visits, notes, and updates without needing to be in the house.
Short-term memory loss and trouble with familiar tasks, unfolding over years. 60–80% of all cases, per the CDC. At home: consistent routines, medication reminders, gradually increasing supervision.
Slowed thinking and problem-solving decline in steps, tied to stroke or cardiovascular history. About 5–10% of cases — the second most common. At home: fall prevention and watching for further events.
Visual hallucinations, disrupted sleep, and Parkinson’s-like movement changes, with attention that fluctuates day to day. Often hard to diagnose — early symptoms can resemble Alzheimer’s or psychiatric illness, per the NIA.
Personality change, poor judgment, loss of empathy, or language trouble while memory stays intact early. About one-third of cases are inherited, per the CDC — and younger onset often catches families off guard.
Primary care handles most of the workup. Atypical symptoms, younger onset, or a pattern that doesn’t fit cleanly can call for a specialist — a referral usually just means the picture needs more clarity.
The five most commonly named are Alzheimer’s, vascular, Lewy body, frontotemporal, and mixed dementia. The NIA highlights the first four as the main types; the CDC identifies mixed dementia as common enough to name separately.
Together, these five account for the large majority of dementia diagnoses.
The count varies because sources group rarer conditions differently. Four types cover most cases, while expanded lists add mixed dementia, young-onset dementia, Parkinson’s disease dementia, and rarer conditions like Creutzfeldt-Jakob disease.
The exact number depends on how narrowly or broadly a source defines “type.”
No. Frontotemporal dementia often starts with personality, behavior, or language changes, per the CDC; Lewy body can begin with hallucinations, sleep disturbances, or movement changes, per the NIA.
Memory loss remains the most common first symptom overall, but it isn’t the only way dementia shows up.
Diagnosis usually involves several steps, not a single memory test: a detailed history and cognitive testing, lab work to rule out reversible causes, brain imaging, and in some cases cerebrospinal fluid or blood-based biomarkers.
We often support families before, during, and after this workup — helping translate a new diagnosis into a plan for daily life.
Mixed dementia means more than one type affects the brain at the same time — most commonly Alzheimer’s paired with vascular dementia, per the CDC.
Because symptoms may not fit one clean pattern, both diagnosis and day-to-day care tend to stay flexible rather than following a single playbook.
FTD stands for frontotemporal dementia, a type that affects the frontal and temporal lobes. The CDC notes FTD often changes personality, behavior, judgment, or language before it affects memory — and about one-third of cases are inherited, which makes family history especially relevant when symptoms appear before age 65.
“Aggressive” depends on how it’s defined. Creutzfeldt-Jakob disease progresses fastest among known types but is rare. Among the four common types, progression varies widely by person, age, and overall health.
Mixed dementia can complicate the picture further, so a specialist evaluation gives a clearer answer than any general ranking.
When daily safety, supervision, or family caregiver burnout become real concerns — wandering, falls, hallucinations that unsettle the household, missed medication reminders, or a caregiver reaching a breaking point.
We offer flexible support with no long-term contract required, so respite care can begin as soon as a family needs it.
A diagnosis is a starting point for planning, not an endpoint.
Call our Clarksville team to walk through what type-specific care looks like at home — no long-term contract required.
