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I've got massive social connections and I've always considered myself an introvert and quite shy. Not anymore.
In the past decade, our understanding of cognitive decline has profoundly shifted. We once thought that brain aging was inevitable—we all marched towards our fate, predetermined by genetics, with decline seen as a natural and unavoidable endpoint. But, of course, individuals have always defied these expectations. They remained remarkably sharp late into life, often performing on memory tests at the level of people 30 years younger. They’ve long fascinated researchers. For the past 25 years, researchers at Northwestern University have been studying a group of these remarkable individuals, known as SuperAgers, to understand what sets their brains apart. Now, a landmark study from the program reveals two distinct pathways to exceptional cognitive aging—and one lifestyle factor that nearly all SuperAgers share.
The 25-year-long research that has made this all possible
The term "SuperAger" was coined by Northwestern's Mesulam Center for Cognitive Neurology and Alzheimer's Disease in 2008 to describe adults 80 and older who maintain memory performance on par with people in their 50s and 60s. Since 2000, the SuperAging Research Program has followed 290 participants, tracking their cognitive function over time. To qualify as a SuperAger, participants must score at least 9 out of 15 on a delayed word recall test—a threshold typically seen in people decades younger. What makes this research so significant is the brain donation component. Of the 290 participants, 77 have donated their brains for postmortem analysis, giving researchers an unprecedented window into the biological mechanisms behind exceptional aging. This kind of long-term, brain-based research is incredibly rare—and essential. It allows scientists to connect real-life cognitive performance with what’s physically happening in the brain, offering one of the clearest pictures yet of how memory can be preserved over decades.
What this study found
We know from previous research that some brains collect and accumulate damaging proteins, resulting in impaired cognitive function and sometimes later leading to Alzheimer's or Dementia. However, we also know (quite surprisingly) accumulation of these proteins don’t always lead to a diseased brain. The SuperAging Research Program has been studying this exact distinction, trying to understand why some brains decline while others don’t. The study, recently published in Alzheimer's & Dementia: The Journal of the Alzheimer’s Association, outlined the two distinct pathways to maintaining sharp memory. The first is resistance—these SuperAgers naturally avoided the buildup of amyloid plaques and tau tangles, the proteins associated with Alzheimer's disease. Their brains showed minimal accumulation of these harmful deposits, making them naturally less susceptible to cognitive decline. But the second pathway is resilience. Some SuperAgers had significant plaque and tangle buildup—levels that would typically cause cognitive decline—yet their memory remained intact. Their brains somehow tolerated the damage without losing function. Researchers also identified unique structural features in SuperAger brains: a thicker anterior cingulate cortex
1(a region tied to attention and decision-making), morevon Economo neurons
(specialized cells linked to social cognition), and
larger neurons in the entorhinal cortex (a memory hub that's often the first area affected by Alzheimer's).
Why resilience may matter more than resistance
This finding reframes how we think about brain aging. You don't need a "perfect" brain to maintain exceptional memory—some SuperAgers had Alzheimer's-level pathology but showed no symptoms. The resilience pathway suggests that the brain's ability to compensate for damage may be just as important as preventing it in the first place.In the past decade, our understanding of cognitive decline has profoundly shifted. We once thought that brain aging was inevitable—we all marched towards our fate, predetermined by genetics, with decline seen as a natural and unavoidable endpoint. But, of course, individuals have always defied these expectations. They remained remarkably sharp late into life, often performing on memory tests at the level of people 30 years younger. They’ve long fascinated researchers. For the past 25 years, researchers at Northwestern University have been studying a group of these remarkable individuals, known as SuperAgers, to understand what sets their brains apart. Now, a landmark study from the program reveals two distinct pathways to exceptional cognitive aging—and one lifestyle factor that nearly all SuperAgers share.
The 25-year-long research that has made this all possible
The term "SuperAger" was coined by Northwestern's Mesulam Center for Cognitive Neurology and Alzheimer's Disease in 2008 to describe adults 80 and older who maintain memory performance on par with people in their 50s and 60s. Since 2000, the SuperAging Research Program has followed 290 participants, tracking their cognitive function over time. To qualify as a SuperAger, participants must score at least 9 out of 15 on a delayed word recall test—a threshold typically seen in people decades younger. What makes this research so significant is the brain donation component. Of the 290 participants, 77 have donated their brains for postmortem analysis, giving researchers an unprecedented window into the biological mechanisms behind exceptional aging. This kind of long-term, brain-based research is incredibly rare—and essential. It allows scientists to connect real-life cognitive performance with what’s physically happening in the brain, offering one of the clearest pictures yet of how memory can be preserved over decades.
What this study found
We know from previous research that some brains collect and accumulate damaging proteins, resulting in impaired cognitive function and sometimes later leading to Alzheimer's or Dementia. However, we also know (quite surprisingly) accumulation of these proteins don’t always lead to a diseased brain. The SuperAging Research Program has been studying this exact distinction, trying to understand why some brains decline while others don’t. The study, recently published in Alzheimer's & Dementia: The Journal of the Alzheimer’s Association, outlined the two distinct pathways to maintaining sharp memory. The first is resistance—these SuperAgers naturally avoided the buildup of amyloid plaques and tau tangles, the proteins associated with Alzheimer's disease. Their brains showed minimal accumulation of these harmful deposits, making them naturally less susceptible to cognitive decline. But the second pathway is resilience. Some SuperAgers had significant plaque and tangle buildup—levels that would typically cause cognitive decline—yet their memory remained intact. Their brains somehow tolerated the damage without losing function. Researchers also identified unique structural features in SuperAger brains: a thicker anterior cingulate cortex
1 (a region tied to attention and decision-making), more von Economo neurons(specialized cells linked to social cognition), and larger neurons in the entorhinal cortex (a memory hub that's often the first area affected by Alzheimer's).
Why resilience may matter more than resistance
This finding reframes how we think about brain aging. You don't need a "perfect" brain to maintain exceptional memory—some SuperAgers had Alzheimer's-level pathology but showed no symptoms. The resilience pathway suggests that the brain's ability to compensate for damage may be just as important as preventing it in the first place.For researchers, this opens new avenues for intervention. Rather than focusing solely on preventing plaque buildup, future therapies might also target the brain's capacity to function despite it—zeroing in on some of the structural elements mentioned above.
The lifestyle factor that linked nearly all SuperAgers
When researchers looked at what SuperAgers had in common, one factor stood out: social connection. While their exercise habits, diets, and other lifestyle choices varied widely, most SuperAgers were highly social and maintained close, meaningful relationships throughout their lives.>This aligns with a growing body of research linking social engagement to cognitive health. Strong relationships may protect the brain by reducing chronic stress, promoting mental stimulation, and supporting emotional well-being. A few ways to prioritize connection for brain health:Nurture existing relationships:Regular check-ins with close friends or family (even brief phone calls!) strengthen bonds over time. Studies regularly show that experiencing love—like you have for partners, family and friends—improves brain function. Join a class, club, or volunteer group that aligns with your interests to expand your circle. Research has found that social activities like this not only improve long-term cognitive function, but boost mental health and physical activity. Engage in small talk with those in your direct community:We may think only deep, long-lasting relationships matter (and they do!) research also indicates that the brief interactions we have with folks day-to-day also plays a role. Think: the morning chatter you share with the barista on your coffee run, talking about weekend plans during checkout at the grocery store, or watercooler talk at work.
The takeaway
This 25-year study reveals that exceptional memory in your 80s can happen through two pathways: resisting brain changes or being resilient to them. The common thread among SuperAgers isn't a perfect diet or exercise routine, but maintaining close social connections. In other words, brain longevity may be less about doing everything “right” and more about consistently investing in the relationships that keep you mentally and emotionally engaged. And how lovely is that?
So if you do one thing today after reading this article, I sincerely hope it's this: Make the phone call, schedule the coffee date, plan the girls trip: Prioritizing meaningful relationships may be one of the most powerful things you can do for long-term brain health.
