Taxi and ambulance drivers show significantly lower Alzheimer’s risk in national mortality study
Professions requiring constant spatial navigation physically reshape the hippocampus, the brain region Alzheimer’s attacks first. By routinely building mental maps, individuals may develop a cognitive reserve that delays the onset of severe memory loss.
Taxi and ambulance drivers have shown a lower risk of dying from Alzheimer's disease compared to workers in most other occupations, according to a study of nearly 9 million death certificates in the U.S. Researchers attributed this reduced risk to the continuous mental work of navigation, which engages the hippocampus, a brain region crucial for memory and spatial navigation.
The hippocampus is one of the first areas to show damage in Alzheimer's disease, with spatial navigation and orientation being early signs of the condition. While London taxi drivers, who undergo rigorous navigation training called "The Knowledge," were found to have more gray matter in the posterior hippocampus, the study suggests that the job itself, not just the navigational skills, may confer this protective effect.
The findings imply that occupations requiring intensive spatial reasoning, such as cartography, urban planning, and geospatial analysis, could potentially protect against Alzheimer's disease by stimulating the hippocampus.
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