What Retrogenesis theory actually changes about how you talk, what you hand someone, and how you set up a room, once you move past understanding it and start using it.
A man who ran a manufacturing plant for forty years now hands you his dinner plate the way a toddler hands over a toy, both palms up, waiting to see what happens next. That gesture is not random. It has a name: Retrogenesis, the theory that dementia, specifically Alzheimer's, often unwinds development in something close to reverse order, so the abilities someone loses map, roughly, onto stages a child once moved through on the way up. Naming that pattern is useful. Knowing what to actually do with it is a different skill, and that is where this post picks up.
This is the Tuesday afternoon version of that theory. Not just what Retrogenesis is and where it came from, but what changes in how you talk to someone, what you hand them, and what you expect from a room, once you stop just understanding the theory and start applying it.
What Retrogenesis Actually Predicts
Retrogenesis, first described by geriatric psychiatrist Barry Reisberg, proposes that functional losses in Alzheimer's disease happen in roughly the reverse order that children gain those same functions during development. Reisberg also built the Functional Assessment Staging tool, or FAST, around this idea, linking stages of decline to approximate developmental ages.
In practice, that means someone at a moderate stage may struggle with sequencing, judgment, and multi-step tasks in ways that resemble a school-age developmental window. Someone at a more advanced stage may respond more to tone, touch, rhythm, and facial expression than to language itself, more like a toddler or infant before words carry most of the meaning.
That developmental age is not a statement about identity, dignity, or personhood. It is simply a rough map of which abilities are still online and which have gone quiet.
How to Talk to Someone at a Different Developmental Window
This is where Retrogenesis becomes useful, if you use it carefully.
- If someone is functioning closer to a school-age window, give one instruction at a time. Say, Let's brush your teeth instead of Go brush your teeth, then get your pajamas, then meet me in the living room.
- If someone is functioning closer to a toddler or infant window, remember that your face and tone are doing more work than your words. Slow down. Let your expression soften. Keep your voice calm and grounded.
- Watch for baby talk. It is easy to slip into, especially when you are tired. The goal is not to speak as if the person is a child. The goal is to reduce complexity while keeping your tone respectful and adult.
If you try one thing tonight, make your next instruction a single step and watch what changes.
Choosing Activities That Fit the Stage in Front of You
This is the Cognitive spoke of the Wheel of Function Framework™ in action. The framework teaches that behavior is not the problem. Behavior is the signal. One of the most common signals caregivers misread as agitation or refusal is simply a mismatch between the task and the person's current capacity.
An activity matched to a school-age developmental window might include a few steps and a real choice, such as picking ingredients to stir into a bowl or sorting photos into simple categories.
An activity matched to a toddler or infant window usually works better as a single, repetitive, sensory experience with little or no sequencing required. That might look like:
- folding the same towel over and over
- sorting large buttons or objects by color
- holding a soft blanket
- stroking fabric with different textures
- moving a familiar object from one hand to the other
Neither kind of activity is better or worse. They are simply matched to what the brain can do right now.
A helpful question is this: did you hand the person a project or an object? A project has steps. An object only needs to be touched, held, or moved. When in doubt, go simpler than you think you need to. Let success build from there.
What the Room Needs to Change as the Stage Shifts
As functional age moves earlier, environment and sensory input matter more, not less. A person in a school-age developmental window may tolerate background noise and a few visible choices. A person in a toddler or infant window often cannot.
Multiple sounds, cluttered surfaces, busy patterns, or harsh lighting can overload a nervous system that no longer filters well. Before assuming a person is resisting care, look at the room.
Start with two simple changes:
- Reduce the room to one sound source at a time. Turn off the television if you are talking. Pause the music if you are giving a cue.
- Clear the space down to one object. If you want someone to engage with a brush, cup, towel, or snack, make that the only item in front of them.
These quick adjustments reflect the Sensory and Environment spokes of the Wheel of Function Framework™ and often lower distress faster than more talking ever will.
Where Retrogenesis Falls Short
Retrogenesis is useful, but it is still a broad planning tool. It describes an average pattern across groups of people. It does not fully predict the person in front of you.
That matters because people with dementia can still show flashes of highly complex communication that do not fit neatly into a developmental-age comparison. Research has documented humor, irony, and sarcasm even in people staged at severe levels on FAST. A toddler cannot make a dry, ironic comment. A person with dementia sometimes still can.
That is not a failure of the theory. It is a reminder that stage is a starting hypothesis, not the whole story.
Use the Theory, Then Check the Person
This is exactly why the Wheel of Function Framework™ matters. Retrogenesis gives you a rough developmental window to plan around before you walk into the room. The framework then asks you to test that prediction against what is actually happening across five spokes:
- Emotional
- Sensory
- Physical
- Cognitive
- Environment
If the stage-based prediction and the actual moment do not match, that mismatch is not failure. It is information. It tells you that one of the spokes may be under strain today.
Reading the Stage Without Reducing the Person
Use Retrogenesis the way you would use a weather forecast before a hike. It helps you prepare. It does not tell you exactly what will happen.
Let it shape your starting expectations for communication, activities, and environment. Then check those expectations against the actual person in front of you today. A developmental age is a planning tool. It is never a verdict on someone's worth, inner life, or capacity to feel, notice, and connect.
If you want a simple place to begin, the Navigating Dementia Quick-Start Guide walks you through the five spokes of the Wheel of Function Framework™ with a short worksheet you can use the next time a behavior leaves you stuck.
Want a practical way to start this week?
Grab the free Navigating Dementia Quick-Start Guide. It walks you through the five spokes, Emotional, Sensory, Physical, Cognitive, and Environment, so you can figure out what a behavior is actually signaling before you react to it. click here for guide
Notes
- Moos, I. (2011). Humour, irony and sarcasm in severe Alzheimer's dementia: A corrective to retrogenesis? Ageing & Society, 31(2), 328-346. https://doi.org/10.1017/S0144686X10001054
- Reisberg, B., Franssen, E. H., Souren, L. E. M., Auer, S. R., Akram, I., & Kenowsky, S. (2002). Evidence and mechanisms of retrogenesis in Alzheimer's and other dementias: Management and treatment import. American Journal of Alzheimer's Disease and Other Dementias, 17(4), 202-212. https://doi.org/10.1177/153331750201700411
- Sclan, S. G., & Reisberg, B. (1992). Functional assessment staging (FAST) in Alzheimer's disease: Reliability, validity, and ordinality. International Psychogeriatrics, 4(Suppl 1), 55-69. https://doi.org/10.1017/S1041610292001157
ABOUT THE AUTHOR
Carlyn Lenfestey, PT, MPT, CDP, CADDCT, is a licensed physical therapist with 25 years of clinical experience and 15 years specializing in dementia care. She is the founder of A Better Way: Dementia Care Solutions, LLC and creator of the Wheel of Function Framework™.
DISCLAIMER
The information provided in this blog is for educational purposes only and should not be considered medical advice. Always consult with a doctor or a licensed physical therapist before starting any new exercise routine, using assistive devices, or following the recommendations mentioned. Every individual's needs are different, and professional guidance is essential to ensure safety and appropriateness of care.
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