Superaging: What the "Superagers" Brains Look Like

Most of us assume that cognitive decline is an inevitable part of getting older. We expect names to slip our minds and memories to fade as we approach our eighth decade. However, a unique group of individuals known as “Superagers” is challenging this narrative. These are men and women over the age of 80 who possess the episodic memory and cognitive sharpness of people in their 50s. Recent neurological studies have begun to map exactly why their brains are different.

Defining a Superager

The term “Superager” was coined by researchers at Northwestern University’s Mesulam Center for Cognitive Neurology and Alzheimer’s Disease. It is not just a compliment for a sharp grandmother; it is a strict clinical classification.

To qualify as a Superager, an individual must be over 80 years old and undergo rigorous cognitive testing. The primary requirement is that their performance on episodic memory tests (recall of past personal events) must be at least as good as the average person aged 50 to 65. Additionally, they must score within the normal range for their age group on other cognitive tests, ensuring their memory isn’t just an isolated anomaly.

The Anatomical Difference: Cortical Thickness

When neurologists look at the brain scans of typical 80-year-olds, they usually see a phenomenon called cortical thinning. The cerebral cortex is the outer layer of the brain responsible for critical thinking, memory, and awareness. In normal aging, this layer shrinks.

In Superagers, the picture is radically different. MRI scans reveal that their brains maintain a cortical thickness comparable to much younger adults. Specifically, the rate of atrophy (shrinkage) in Superagers is significantly slower. While average adults lose roughly 2.24% of their brain volume per year, Superagers lose only about 1.06%.

The Anterior Cingulate Cortex

One specific region stands out in these scans: the anterior cingulate cortex. This area of the brain is thicker in Superagers than in typical peers. The anterior cingulate cortex is critical for attention, conflict resolution, and motivation. It essentially acts as the brain’s hub for focus and perseverance. The preservation of this region suggests that Superagers maintain a high capacity for attention, which directly supports memory retention.

The Secret Weapon: Von Economo Neurons

Beyond the general thickness of the brain, scientists have discovered a microscopic difference. Superagers possess a significantly higher density of a specific type of brain cell called Von Economo neurons (VENs).

VENs are large, spindle-shaped neurons found only in humans, great apes, elephants, and whales. They are heavily linked to social intelligence, rapid communication across the brain, and intuition. In studies conducted by Northwestern University, Superagers were found to have up to four to five times more Von Economo neurons in the anterior cingulate cortex compared to typical 80-year-olds. In some cases, they had even more than 20-year-olds. This suggests that maintaining high-speed neural connections is a key component of superior memory.

Findings from The Lancet Healthy Longevity Study

In a major study published in The Lancet Healthy Longevity in mid-2023, researchers from the Queen Sofia Foundation Alzheimer Center in Madrid provided further insights. They compared 64 Superagers with 55 typical older adults over several years.

The study highlighted distinct biological differences beyond just cortical thickness:

• Grey Matter Volume: Superagers showed greater volume in the thalamus (involved in sensory relay) and the cerebellum (involved in movement and motor memory).
• Movement Speed: There was a direct correlation between movement and memory. Superagers had faster finger-tapping speeds and faster walking speeds than their counterparts.
• Mental Health: The Superager group reported significantly lower levels of anxiety and depression, suggesting emotional resilience plays a role in physical brain preservation.

Resistance vs. Resilience: The Alzheimer’s Paradox

One of the most surprising findings in Superaging research is the presence—or absence—of Alzheimer’s markers.

One might assume Superagers have “clean” brains, free of the amyloid plaques and tau tangles associated with Alzheimer’s disease. While many do, post-mortem studies have revealed that some Superagers actually have significant plaque buildup consistent with Alzheimer’s pathology.

Despite the biological presence of the disease, they never displayed symptoms during their lives. This indicates a phenomenon called cognitive resilience. Their brains built enough structural reserve (thicker cortex, more neurons) to bypass the damage caused by the plaques. They essentially “out-networked” the disease, maintaining function despite physical deterioration that would cause dementia in others.

Factors Contributing to Superaging

While genetics play a role, the Madrid study and Northwestern research point to specific lifestyle factors that separate Superagers from typical agers.

High-Effort Mental Activity

Superagers rarely stick to easy routines. They engage in “high-effort” learning. This does not mean doing the same crossword puzzle every day, which largely relies on retrieved knowledge. Instead, they tackle new challenges that result in frustration and fatigue, such as mastering a new language, learning a complex instrument, or navigating new technology. This strain promotes neuroplasticity.

Robust Social Networks

Strong social relationships are a common thread. The high count of Von Economo neurons (linked to social interaction) supports this. Superagers tend to have deep, positive relationships rather than just frequent casual contact.

Physical Agility and Exercise

The link between movement speed and memory is undeniable. Regular aerobic exercise increases blood flow to the brain and stimulates the release of BDNF (Brain-Derived Neurotrophic Factor), a protein that supports neuron growth. Superagers are often physically active well into their 80s, engaging in gardening, walking, or stair climbing.

Frequently Asked Questions

Is Superaging purely genetic? No. While genetics play a role, researchers estimate that about 60% to 70% of how we age is determined by lifestyle and environmental factors. This includes diet, exercise, cognitive challenges, and social engagement.

Can I become a Superager if I start late? It is never too late to improve brain health. While you cannot change your genetics, studies show that adopting high-effort learning and increasing physical activity in your 50s, 60s, or 70s can slow the rate of cortical thinning and build cognitive reserve.

Do Superagers have special diets? There is no single “Superager diet,” but studies show they generally follow patterns similar to the Mediterranean diet or the MIND diet. These include leafy greens, berries, nuts, whole grains, and fish, while limiting red meats and sugars.

How do I get tested to see if I am a Superager? Official classification usually happens through enrollment in clinical studies, such as those at major research universities like Northwestern. However, a neurologist can perform standard cognitive assessments to determine how your memory compares to age-adjusted norms.