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At Road & Track, we have long been enthusiasts of manual transmissions, and now there’s scientific research to back that passion. A new study from the Institute of Development at Tohoku University indicates that driving a manual gearbox actively engages the prefrontal cortex in a way that operating an automatic transmission does not.

This groundbreaking work, initially reported by the Japanese publication Best Car Web and later highlighted by Carscoops, was led by Professor Ryuta Kawashima. Known for his expertise in neuroimaging and his previous involvement in developing Nintendo’s Brain Age puzzle games, Kawashima explained that the physical coordination required to drive a manual transmission strongly stimulates the brain regions responsible for memory, concentration, and decision-making. The findings revealed that driving a manual car daily acts as a subtle yet effective mental exercise, particularly beneficial for older adults in maintaining cognitive function. In contrast, the study suggests that driving an automatic car does not produce the same neurological benefits.

Despite these benefits, manual transmissions are becoming increasingly rare worldwide. The study notes that in Japan, only about one to two percent of new vehicles sold still include a clutch pedal. In the United States, the figure is even lower, with manuals representing just 0.7 percent of new car sales in 2024. Europe, however, continues to show stronger numbers, with countries like Spain and Italy recording manual transmission usage rates of 41 percent and 48 percent, respectively.

For enthusiasts, this research offers yet another compelling reason to consider a manual transmission car while it's still possible. As of 2026, only around 24 new models in the U.S. will continue to offer manual gearboxes. If you already own a modern manual car, holding onto it might not just be a matter of driving enjoyment—it could also help keep your brain active and alert.