Superagers are adults ages 80 and older who tend to retain their brain health and cognition. A new study found that superagers also grow more neurons than other older adults.
A recent study focusing on neurogenesis, showed that the brains of superagers have the unique ability to form new neurons from neural stem cells. The study analyzed brain samples from healthy young adults, healthy older adults, adults with mild dementia, adults with Alzheimer's, and superagers. Scientists found first, that hippocampal neurogenesis-the creation of new neurons in the hippocampus, happens in healthy human adults. They also discovered that superagers tended to make more new neurons when compared to other adult groups.
For a long time, the adult brain was seen as relatively fixed. This study provides strong biological evidence for what we hope to be true, that the brain has a capacity for renewal. The study also validates the lifestyle-based advice that doctors give their patients everyday. Exercise and lifelong learning support brain health. The study suggests that these activities aren't just keeping the brain "busy," but may be directly influencing the biological machinery that promotes the growth of new neurons and build resilience against decline.
Habits that support hippocampal health include consistent aerobic exercies, following a brain healthy diet like the Mediterranean diet, continuing to learn and staying socially engaged, and getting enough sleep. Doing these things does not guarantee strong brain health, but for now, it's what most doctors and researchers feel gives our best possibility for a healthy brain.
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