Small Immature Neurons Might Harden the Brain Against Alzheimer’s

Researchers report that the aging human hippocampus still produces immature neurons even after 80, but cognitive resilience to Alzheimer’s dementia seems to hinge on how these cells behave: in resilient brains they activate survival programs and dampen inflammation rather than simply replacing lost cells. This suggests immature neurons may support surrounding tissue like a fertilizer, helping the brain stay functional despite pathology and pointing to therapies that boost resilience rather than just increase neuron production.