06/09/2026
🧠 Different Dementias Affect Different Parts of the Brain
One of the greatest misconceptions about dementia is believing that all dementias are the same.
They are not.
Different dementias affect different regions of the brain, which means they create different symptoms, different behaviors, different emotional responses, and different caregiving challenges.
Alzheimer’s disease often begins in the memory centers of the brain, which is why short-term memory loss is commonly one of the first signs families notice.
Frontotemporal Dementia (FTD) affects the frontal and temporal lobes, so personality changes, impulsivity, loss of empathy, inappropriate behavior, or language difficulties may appear long before memory problems.
Lewy Body Dementia can cause vivid visual hallucinations, Parkinson-like movement changes, sleep disturbances, and dramatic fluctuations in alertness and cognition from hour to hour.
Vascular Dementia is often connected to strokes or reduced blood flow in the brain and may decline in a “stepwise” pattern rather than gradually.
Posterior Cortical Atrophy (PCA) affects visual processing areas of the brain. Someone may struggle to read, recognize objects, judge depth, or navigate spaces even when memory still seems relatively preserved.
This is why education matters.
When care partners understand the brain behind the behavior, they stop taking symptoms personally and begin responding with greater compassion, patience, and wisdom.
A person living with dementia is not “giving you a hard time.”
Very often, they are having a hard time because their brain is processing the world differently.
Behavior is communication.
Confusion is communication.
Fear is communication.
Repetition is communication.
The more we understand the changing brain, the better we can create safety, dignity, connection, and peace at home. 💙
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