Study Reveals Secrets of ‘SuperAgers’ and Their Sharp Memories
Cognitive decline is often seen as a normal part of aging, but a new study suggests that not everyone experiences this decline in the same way. Researchers at Northwestern University have been investigating a group of individuals over 80 years old, known as “SuperAgers,” who maintain memory skills that are more like those of people in their 50s.
SuperAgers are defined as people aged 80 and above who can remember details just as well as those who are much younger. To be classified as a SuperAger, an individual must score at least 9 out of 15 on a memory recall test. This unique term was introduced by Dr. M. Marsel Mesulam, who founded the Mesulam Center for Cognitive Neurology and Alzheimer’s Disease at Northwestern.
Over the past 25 years, researchers have been studying nearly 300 SuperAgers. They have found that many of these individuals share a few key traits: they tend to be outgoing, sociable, and have strong relationships with others.
Dr. Sandra Weintraub, a professor at Northwestern’s Feinberg School of Medicine, expressed excitement about what they discovered in their brains. The study showed that some SuperAgers’ brains had little to no buildup of amyloid and tau proteins, which are commonly associated with Alzheimer’s disease. In cases where these proteins were present, they did not seem to impact cognitive function.
The research team examined the donated brains of 77 SuperAgers after they passed away. They noted that many of them had a thicker anterior cingulate cortex, a part of the brain involved in decision-making and emotions, and a higher number of specialized cells linked to social behavior and memory.
“We learned that there are two main factors that can help someone become a SuperAger,” Dr. Weintraub explained. “One is resistance: they don’t produce harmful plaques and tangles. The other is resilience: even if they do develop these substances, their brains remain healthy.”
Unlike typical aging brains, SuperAgers often do not experience significant thinning of the cortex, which is the brain’s outer layer. This unique brain structure supports the idea that exceptional memory in old age is possible and is connected to specific biological features.
What this study means for the future is promising. Researchers hope to use these findings to create new ways to enhance brain health and possibly delay or prevent conditions like Alzheimer’s disease.
Dr. Marc Siegel, a senior medical analyst who was not part of the study, highlighted that maintaining a balance of genetics and continued brain exercise—socially and intellectually—plays a crucial role in sustaining cognitive function. He noted that those who remained engaged socially and intellectually continued to fare well mentally, even with some age-related changes in their brains.
Ultimately, this research is not just about understanding SuperAgers; it opens doors for better strategies to promote brain health for everyone as they age.
