Brains that Keep Growing: How New Cells Help Memory Stay Sharp

Scientists have confirmed that adult brains still produce new neurons as people age, and those who keep the process active seem to remember better.

Study Scope
Brain tissue from adults ranging in age from young adults to over 80 was examined. All participants had strong memories.
Key Findings
Healthy brains produced enough new cells to account for about 0.01 % of total hippocampal neurons—the brain region most involved in memory.
Individuals with cognitive decline (e.g., Alzheimer’s) had noticeably fewer immature neurons.
A small group of “super agers” displayed even more young cells, although the sample size was limited.

Implications
If researchers can uncover what sustains neuron sprouting, it could lead to therapies that enhance brain health in aging populations.
Historical Context
The debate over adult neurogenesis has spanned more than a century. Early scientists claimed neuron production ceased after birth, but subsequent research proved it can continue into old age—this study reinforces that modern view.

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