A baby learns how to eat, feed themselves, walk, and use the bathroom, with each new skill building on the last. With Alzheimer’s disease, that sequence runs in reverse.
“Things are going backwards with Alzheimer’s,” said Faith D. Atai, MD, a geriatric medicine physician at UT Physicians Center for Healthy Aging – Bellaire Station. “Smiling is one of the first things a baby does and an important sign of normal brain development. One of the last things we see in very late-stage Alzheimer’s is they stop smiling.”
Alzheimer’s is a disease in the brain and the most common form of dementia, affecting memory, thinking, and behavior. One of the biggest challenges is telling what’s part of normal aging and what may signal a serious brain disease.
The trail goes cold
Normal aging may slow processing, but Alzheimer’s disrupts it. With normal aging, memory lapses are usually recoverable. Someone reminds you of the last line of a conversation, and you can pick back up. With Alzheimer’s, that cue often isn’t enough.
“It’s like the trail goes cold, and the person can’t get back where they left off,” said Atai, an associate professor of geriatrics at McGovern Medical School at UTHealth Houston.
The changes go beyond memory. A person who has always known how to use a toaster may forget entirely. Dish soap might end up in the refrigerator or metal utensils in the microwave. These go beyond simple forgetfulness and begin to affect everyday life.
Judgment shifts, too. Atai described patients who argue with GPS directions when they don’t want to go where they’re being told.
A familiar face in an unfamiliar mind
One of the hardest parts for families is that Alzheimer’s can be easy to miss, especially in highly educated or socially skilled individuals who find ways to compensate, often without realizing it.
“A person with Alzheimer’s who is very interactive may give a false sense that everything is OK if they control the conversation,” Atai said.
They may talk about events from 30 years ago because long-term memory tends to last longer. Short-term memory, which helps us learn, adapt, and stay oriented, is often affected first. By the time families realize something is wrong, the signs have usually been there, just hard to interpret.
Watching for missed signs
Not every memory problem is Alzheimer’s. Depression and hearing loss can mimic cognitive decline and are often overlooked in older adults, Atai said.
“If your hearing isn’t good, you can’t remember what you didn’t hear,” she said.
Many older adults withdraw from social situations rather than admit they’re struggling to follow conversations. That isolation, she said, can speed up what may already be underway. Social engagement is a skill, and it fades without use.
Choosing when to act
Sooner is better than later.
“If you feel something is off, that’s the time to raise the concern,” Atai said. “You’ve known this person all your life.”
It doesn’t have to be a dramatic turning point. A series of small incidents can matter just as much as one major event. Getting lost in a familiar neighborhood is not something to dismiss.
Early conversations are almost always easier than delayed ones. Treatments may be more effective, and families have time to adjust gradually. A clearer understanding of what’s happening gives everyone, including the person diagnosed, more options.
“It’s better to be early than late,” Atai said. “If you’re too early, at least your mind is at ease.”
Living in the moment
People in advanced stages of Alzheimer’s are often unaware of their limitations. This can be a mercy for them but exhausting for those around them. Atai said the person is living moment to moment and doesn’t remember the repeated conversations or conflicts. Each one feels new.
“We lose the person we love right in front of us,” Atai said. “If it was only memory, we’d have sticky notes everywhere. It’s judgment, personality, and so much more.”