Dementia Care Commentary
When Dementia Diagnosis Sees the Trees but Misses the Forest
Biomarkers matter. But families and care teams need a practical map for the person’s 24-hour life.
Dementia diagnosis can name the disease process. Care teams still need a map for the person’s 24-hour pattern.
Dementia diagnosis is becoming increasingly precise at identifying the trees: amyloid, tau, neurodegeneration, vascular injury, Lewy body pathology, atrophy, and mixed disease. That progress matters. In Alzheimer’s disease, the 2018 NIA-AA research framework grouped biomarkers into amyloid, tau, and neurodegeneration categories and shifted the field toward a biological definition of disease. The 2024 revised Alzheimer’s criteria further emphasized biomarker-based diagnosis and staging, including amyloid PET, CSF measures, and accurate plasma assays.
But care happens in the forest.
Families and care teams do not manage isolated pathology. They manage repeated waking, fear, urinary urgency, agitation, pain, exhaustion, resistance to care, medication vulnerability, caregiver fatigue, and functional decline across the full 24-hour day.
A diagnosis may tell us what disease process is present. It may not tell a family what to do at 2 a.m.
That is the care gap.
The question is not whether biomarkers matter. They do. The question is whether dementia diagnosis can be translated into a practical map for the person, the caregiver, and the care team living with the disease hour by hour.
How Is Dementia Diagnosed? The Usual Steps
There’s no single test for dementia. Doctors usually put together several pieces:
- A detailed history from the person and someone who knows them well: what has changed, and when.
- Memory and thinking tests, short questionnaires that check memory, attention, language and problem-solving.
- A physical and neurological exam, including movement, balance, reflexes and senses.
- Blood tests to rule out treatable causes, such as low vitamin B12, thyroid problems or infection.
- A medication review, since some medicines can cause confusion.
- Brain imaging, usually a CT or MRI scan, to look for strokes, shrinkage or other changes.
- Specialist tests in some cases, such as PET scans, spinal fluid tests or newer blood tests, to identify Alzheimer’s or other types.
Together, these name the type of dementia, such as Alzheimer’s, vascular, Lewy body or mixed. That name matters. But as the rest of this commentary argues, it’s only the beginning of a useful care plan. For how dementia usually progresses, see the stages of dementia.
If Your Loved One Hasn’t Been Diagnosed
Many families never get a formal diagnosis. The person may refuse to see a doctor, or the family may feel that a label won’t change anything. That’s common and understandable. You can still care for them well, starting today.
Why one doctor’s visit can still be worth it:
- Some causes of memory problems are treatable, such as low vitamin B12, thyroid problems, medication side effects, depression, hearing loss, sleep apnea and urinary infections. Fixing them can bring real improvement.
- It helps with safety and planning: driving, money, legal papers and help at home.
Gentler ways to start:
- A regular check-up rather than a “memory test.” In the U.S., Medicare’s yearly wellness visit includes a brief check of memory and thinking.
- A home visit or telehealth appointment, if leaving the house is the obstacle.
- Speaking to the doctor yourself first, so they know what you’ve noticed before the visit.
What you can do now, with or without a diagnosis:
- Keep days predictable: regular meals, daylight, activity and bedtime.
- Watch for physical needs behind changes in behavior, such as pain, constipation, thirst, hunger or needing the bathroom.
- Make nights safer: night lights, a clear path to the bathroom, and fewer drinks late in the evening.
- Look after yourself too. Caregiver exhaustion is real, and support groups help.
Our guides to stages of dementia and sundowning offer practical help at every stage.
The Diagnosis Names the Disease. The Care Plan Must Map the Pattern.
The current diagnostic system is largely etiology-centered. It asks: “What is causing the dementia?”
That question is essential. Etiology informs prognosis, research, treatment eligibility, medication decisions, and communication about disease mechanisms. Alzheimer’s disease, Lewy body disease, vascular dementia, frontotemporal dementia, and mixed dementia are not interchangeable. For a plain-language overview of how dementia usually changes over time, see our guide to the stages of dementia.
But daily care requires a second question:
“How is this dementia behaving in this person’s life?”
That is often where families, floor teams, and clinicians struggle most.
A biomarker may identify Alzheimer’s pathology, but it does not explain why a person wakes four times a night. An MRI may show atrophy or vascular injury, but it does not tell a caregiver whether evening distress is driven by fear, pain, urinary urgency, constipation, overstimulation, medication timing, or accumulated exhaustion.
The diagnosis may be correct and still fail to guide the night.
Families Live With Patterns, Not Biomarkers
In real care, dementia rarely appears as one clean symptom. It appears as a cluster.
A resident wakes repeatedly. She walks to the bathroom. She becomes fearful in the hallway. She calls out. She is tired the next morning. She refuses bathing. The family worries that she is “declining.” The floor team may document insomnia, nocturia, agitation, wandering, resistance to care, or fatigue as separate events.
But the person may be living one connected day-night pattern.
When those events are separated, care can become reactive. A nighttime event becomes a behavior. A behavior becomes a medication question. A morning refusal becomes a compliance problem. The larger pattern remains invisible.
That is how dementia care can see the trees but miss the forest.
Dementia Care Needs a Care-Guiding Layer
Biological diagnosis should not be replaced. It should be translated.
The biological diagnosis names the disease process. The care-guiding layer names the lived pattern: how dementia appears across the night, morning, body, medication list, environment, caregiver, and floor team.
This layer would identify practical patterns such as:
- Nighttime instability: repeated waking, bathroom trips, wandering, fear, staff assists, sleep fragmentation, and fall risk.
- Evening-to-night escalation: sundowning, overstimulation, anxiety, pacing, calling out, resistance, or fear after late afternoon.
- Morning fallout: fatigue, refusal of care, poor appetite, low participation, irritability, or higher assistance needs after disrupted sleep.
- Unmet physical needs: pain, constipation, urinary urgency, hunger, thirst, infection concern, skin discomfort, or environmental distress.
- Medication vulnerability: sedatives, anticholinergics, diuretics, psychotropics, or medication timing effects.
- Caregiver exhaustion: repeated overnight interruption, emotional depletion, unsafe home-care strain, and higher risk of care breakdown.
These are not abstract categories. They are the patterns that determine whether care is practical, consistent, and humane.
Two people may share the same diagnosis and need very different care maps. One may live primarily with repeated waking and bathroom trips. Another may be most vulnerable to medication timing. Another may show evening distress driven by fear, pain, constipation, urinary urgency, or overstimulation.
When these patterns are not connected, the care plan can miss the person’s actual 24-hour reality.
The 2 A.M. Test
A useful dementia care plan should pass the 2 A.M. Test.
When a person wakes, walks, calls out, or becomes distressed at 2 a.m., the plan should help the caregiver or floor team answer five practical questions:
- What should be observed?
- What physical needs should be checked first?
- What non-drug supports should be tried before escalation, when clinically appropriate?
- When should the nurse, clinician, pharmacist, or interdisciplinary team be notified?
- What should be handed off the next morning so the night becomes part of the 24-hour care picture?
A practical care translation layer would include a 24-hour symptom-pattern summary, nighttime observation guidance, review of physical needs that may appear as behavioral symptoms, medication timing review, caregiver strain assessment, non-drug support options, and a clear night-to-day handoff.
This does not require turning caregivers into diagnosticians. It requires giving them a shared map.
Seeing the Forest
Dementia science has become better at seeing the trees. That progress should be respected.
But dementia care happens in the forest: the night, the morning, the body, the environment, the medication list, the caregiver, the floor team, and the repeated patterns that decide whether daily care succeeds or fails.
A diagnosis that names pathology but cannot guide the night is not enough.
The next step in dementia care is not less scientific precision. It is better translation: from biomarkers to bedside, from disease subtype to daily pattern, from naming the pathology to mapping the person’s life hour by hour.
Commercial disclosure: Qingcai Wang, MD, PhD, developed the external herbal pouch products discussed and has a commercial interest in their sale through Kingxo LLC/Five Essences.
For a caregiver-managed external routine, view the Brain Vitality Herbal Pouch product page.