Summary, timeline and people extracted by Claude from 6 items across 3 sources · 8h ago. Quotes are verbatim.

A 2024 study of nearly 9 million U.S. death certificates (2020–2022) found taxi and ambulance drivers had the lowest Alzheimer's death rate among 443 occupations, a pattern not seen in other driving jobs with fixed routes like bus driving or piloting. Researchers attribute the effect to continuous real-time navigation rather than driving itself, pointing to a landmark 2000 imaging study that found London taxi drivers have enlarged posterior hippocampi correlated with years of experience. The findings, revisited in a 2026 Conversation op-ed by a civil/environmental engineer, suggest hippocampus-engaging spatial work may help protect against Alzheimer's disease.

• A 2024 analysis of nearly 9 million U.S. death certificates (2020–2022) found taxi and ambulance drivers had the lowest Alzheimer's mortality among 443 occupations studied.
• The protective effect appears tied to continuous real-time navigation rather than driving itself: bus drivers and pilots, who follow fixed or predetermined routes, showed no similar benefit.
• A landmark 2000 imaging study found London taxi drivers have measurably more gray matter in the posterior hippocampus, with volume increasing with years of driving experience.
• Both studies together suggest that work intensively exercising the hippocampus—the brain region among the first affected by Alzheimer's—may reshape it and reduce disease risk.