Scientific findings on memory from ‘SuperAgers’ brains

An extraordinary group of older adults is challenging conventional understanding of cognitive decline, maintaining mental sharpness comparable to people decades younger. These individuals, known as SuperAgers, demonstrate that memory loss and reduced mental capacity aren’t inevitable consequences of aging.

Northwestern University’s SuperAging Research Program has studied these exceptional seniors for over two decades, revealing fascinating patterns about brain health in later life. The program defines SuperAgers as individuals over 80 who perform as well on memory tests as healthy adults in their 50s or 60s. Their research suggests that maintaining youthful cognitive abilities involves a combination of biological advantages and lifestyle choices.

Sel Yackley, an 85-year-old participant in the study, exemplifies the SuperAger profile. Her packed schedule includes crafting jewelry, singing in a choir, knitting for charity, participating in a book club, regular gym visits, and civic engagement – all while maintaining healthy sleep patterns. “Take good care of your health, eat right, and be sociable,” Yackley advises, summarizing her approach to aging well.

The Northwestern research group has discovered a number of shared characteristics among SuperAgers through comprehensive psychological evaluations, brain scans, and, in certain cases, analyses of brain tissue after death. Their insights question beliefs about Alzheimer’s disease and the process of cognitive aging.

Neurological examinations of SuperAger brains after death revealed significantly fewer tau protein tangles – a hallmark of Alzheimer’s – in memory centers compared to typical older adults. Surprisingly, amyloid plaque accumulation, another Alzheimer’s indicator, appeared similar between groups. This discovery raises important questions about current Alzheimer’s treatments that primarily target amyloid plaques.

SuperAgers exhibit unique structural differences in their brains. The neurons in their entorhinal cortex, which are essential for forming memories, are larger and more resilient compared to those of others their age. In addition, they have a greater number of von Economo neurons, which are specialized cells linked to social understanding and emotional intelligence.

Aunque la genética indudablemente influye, ya que los SuperAgers generalmente no poseen genes de alto riesgo de Alzheimer como el APOE4, los investigadores destacan que el ADN no es un destino inmutable. Los participantes del estudio exhiben estilos de vida variados, con algunos siguiendo estrictos planes de salud mientras que otros disfrutan de diferentes indulgencias. Lo que parece unirlos es un enfoque comprometido y significativo hacia la vida, en lugar de un comportamiento único.

La interacción social aparece como un tema frecuente entre los SuperAgers, aunque la forma de estos vínculos varía considerablemente. Algunos preservan relaciones familiares estrechas, otros se relacionan a través de comunidades artísticas, y muchos encuentran sentido en la participación cívica o las prácticas espirituales. “No ves a muchos SuperAgers desvinculados”, comenta la Dra. Tamar Gefen, profesora de psiquiatría de Northwestern que participa en el estudio.

The rarity of SuperAgers makes them particularly valuable to science. During initial study recruitment, only 10% of applicants met the stringent cognitive criteria. The current active research cohort includes 101 individuals aged 81 to 111, whose ongoing participation helps scientists understand protective factors against age-related cognitive decline.

These exceptional elders are contributing to science not just during their lives but beyond. Many, like Yackley, have pledged to donate their brains to the Northwestern Brain Bank. “I don’t want to be underground,” Yackley says, explaining her decision to donate her body to medical research and education.

The SuperAger phenomenon provides encouragement and direction for individuals aspiring to preserve cognitive sharpness throughout their lives. Although genetic benefits cannot be duplicated, the noted trends of social involvement, intellectual engagement, and physical exercise offer practical methods to enhance brain health at any stage of life.

As research continues, scientists hope to identify specific protective biological mechanisms that could lead to new approaches for preventing or treating dementia. The SuperAger study reminds us that aging doesn’t necessarily mean cognitive decline, and that maintaining a sharp, engaged mind into advanced age remains an achievable goal for many.

For now, Yackley continues her active life, working on a personal scrapbook project between her many activities. Her example and those of her fellow SuperAgers provide living proof that the golden years can truly shine with mental vitality and purpose.