The Wall of Dementia: What Dr. Hideki Wada Wants Families to Understand Before They Panic

Published in early 2023, The Wall of Dementia builds on Dr. Wada's decades treating older patients as a geriatric psychiatrist. His starting premise is that what determines whether someone's later years go well or badly often comes down to brain aging — and that brain aging has two very different drivers people routinely confuse: dementia, and late-life depression.

His central claim about dementia itself may surprise people who have only absorbed the version of it that shows up in movies and cautionary family stories: it typically progresses slowly, exists on a wide spectrum from mild to severe, and is very rarely the sudden, total loss of self that people picture the moment they hear the word.

His claim about late-life depression is the less comfortable twist: he considers it, in some ways, more dangerous than dementia — harder to spot, more likely to be fatal if untreated, and yet far more treatable once it is actually recognized for what it is.

One example Dr. Wada uses to illustrate how exaggerated the public picture of dementia has become: the widespread assumption that a dementia diagnosis means wandering is inevitable. He points out the simple math does not hold up — with millions of people living with dementia, if wandering were truly a near-universal symptom, it would be an unmistakable, constant presence in daily public life everywhere. In reality, dementia is fundamentally a form of aging, and the far more common pattern is the opposite of wandering: people gradually becoming quieter and more withdrawn, often staying close to home rather than roaming from it.

The wider point is not really about wandering. It is that dementia is a spectrum condition, not a light switch — and treating it like an on/off event leads directly to the behaviour Lauren caught her own family doing: writing someone off, and their remaining abilities along with them, the moment a diagnosis is spoken out loud.

Dr. Wada describes a pattern he has seen repeatedly in his own practice: families arrive with a loved one, quietly assume the person in front of them no longer fully understands what is being said, and start speaking around them instead of to them — sometimes critically, sometimes just dismissively. Abilities the person still clearly has get stripped away pre-emptively out of caution: driving, decisions, small everyday independence, all removed at once under the blanket label of dementia, often well before it is actually necessary.

His point is not that caution is wrong. It is that a diagnosis describes a range, not a verdict — and treating someone as though they have already lost everything, before they actually have, tends to accelerate exactly the decline everyone is afraid of.

For Lauren's family, the shift started with something small: including Edward directly in his own follow-up appointment instead of fielding questions on his behalf. He answered most of them himself.

Perhaps the most practically important part of Dr. Wada's argument is the one families are least likely to be looking for. Because dementia gets so much of the cultural fear and attention, late-life depression — which can look similar from the outside, in withdrawal, memory complaints, and low energy — often goes unrecognized and untreated, even though it responds well to proper care.

His advice, in essence: do not assume every sign of slowing down or forgetfulness is dementia, and do not assume dementia itself is the more dangerous of the two possibilities. Mood deserves just as much attention as memory — and it is worth raising both, clearly, with a doctor rather than guessing at home.

This distinction — between an accurate, spectrum-based understanding of dementia and the all-or-nothing fear most families start with — shapes how we think about in-home support.

Our caregivers are trained to preserve dignity and residual independence rather than assume it away: including a person in their own conversations, supporting the abilities they still have instead of quietly taking over everything at once, and watching closely for the kind of mood changes that can signal depression rather than cognitive decline. Through Companion Care, Chronic Condition Management, and 24/7 Senior Home Care, we build support around where someone actually is on the spectrum — not around the fear a diagnosis can trigger in the people who love them.

We also help families notice early warning signs worth raising with a physician, since both dementia and late-life depression are far easier to manage well when they are caught and understood early, rather than assumed and reacted to.

Every Corelia caregiver is vetted, licensed, and background-checked, and every care plan starts with the person in front of us — not the label attached to them.

If a parent, partner, or you yourself is facing a new diagnosis, the right support can help preserve independence rather than take it away. Book a free, no-obligation assessment with a Corelia Health care coordinator.

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Lauren and Edward Kowalski are illustrative composite examples, not an individual case history. This article summarizes themes from a book published in Japanese, based on publisher descriptions and secondary reporting rather than an official English translation; phrasing reflects our own paraphrase, not direct quotation. This is general education, not a diagnostic tool — any concerns about memory, cognition, or mood should be brought to a qualified physician.