Scientists: Aging Brain Shifts Priorities Rather Than Declining

Researchers at the University of Arizona propose the adaptive aging hypothesis: with age the brain relies less on the hippocampus for precise details and more on the frontal cortex for meaning and accumulated knowledge. This distinguishes healthy aging from Alzheimer's disease, where the hippocampus is instead hyperactive.

• Adaptive aging hypothesis: priorities shift from details to meaning and expertise
• Young brains rely on the hippocampus, older ones on frontal cortex and knowledge
• In Alzheimer's the hippocampus is hyperactive, unlike in healthy aging
• Study published in Perspectives on Psychological Science on September 3, 2026