What part of a taxi drivers brain is bigger?

Taxi drivers had a significantly greater volume in the posterior hippocampus, whereas control subjects showed greater volume in the anterior hippocampus.



Famous neurological research, particularly on London taxi drivers, has proven that they have a significantly larger posterior hippocampus compared to the general population. This specific part of the brain is responsible for spatial memory and navigation. To become a licensed London "Black Cab" driver, candidates must master "The Knowledge," which involves memorizing 25,000 streets and thousands of landmarks within a six-mile radius of Charing Cross. Studies using MRI scans showed that as these drivers spend years navigating the complex "maze" of the city, their posterior hippocampus actually grows physically larger through a process called neuroplasticity. Conversely, the anterior hippocampus in these drivers was found to be slightly smaller than average. In the 2026 era of GPS and AI navigation, this research remains a landmark study in how intense mental exercise and learning can literally reshape the human brain's physical structure to adapt to specific vocational demands.

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There are thousands of streets and landmarks within a six mile radius of Charing Cross. Anyone who wants to drive an iconic London cab must memorize them all: the Knowledge of London. The Knowledge was introduced as a requirement for taxi drivers in 1865.

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As a taxi driver you'll spend many hours of your day sitting behind the wheel, and this can cause a lot of stress on your body. Regular physical activity helps reduce the effects of stress by: Encouraging the release of 'feel good' endorphins.

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These drivers often work 10–12 hours a day, six days a week (2). Research across various cities has shown that these long hours, combined with the sedentary nature of their work, high stress, and low rates of insurance and healthcare access (3), contribute to poor health outcomes (4–6).

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Demographic information on Taxi drivers in the US. The workforce of Taxi drivers in 2021 was 284,336 people, with 17% woman, and 83% men. The average age of male Taxi drivers in the workforce is 45.4 and of female Taxi drivers is 42.1, and the most common race/ethnicity for Taxi drivers is White.

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