- Japanese study shows driving a manual stimulates the prefrontal cortex. - Nintendo’s Brain Age creator led the research into manual gearboxes. - Manual cars account for just 1% to 2% of new vehicle sales in Japan. Petrolheads pour their energy into saving the manual transmission in cars like the Porsche 911 GT3, the kind of halo machine that gets magazine covers and forum crusades. The cheap commuter cars losing their third pedal get no such defense, and they’re disappearing far faster. A study out of Japan adds a wrinkle to the argument anyway, because the case for rowing your own gears may reach past the fun of it and into the health of your brain. More: Suzuki’s Every PA Still Has Crank Windows, But It Also Has A Manual The research comes from Professor Ryuta Kawashima, who runs neuroimaging work at Tohoku University’s Institute of Development, Aging, and Cancer. Kawashima is no obscure academic. He built the science behind Nintendo’s Brain Age series, the puzzle games that sold millions on the promise that the mind responds to exercise like any other muscle. What The Clutch Does To Your Head According to a report from local outlet Best Car Web, the study found that the physical sequence of driving a manual lights up the prefrontal cortex, the region that handles memory, attention, and decision-making. Reading traffic speed, dipping the clutch, picking a gear by hand, and metering the throttle all happen at once, and keeping them coordinated demands a level of engagement that holds the driver’s attention from one moment to the next. In a country aging as quickly as Japan, asking the brain to juggle those inputs every day functions as a kind of low-grade workout it would otherwise skip. Stimulating neural pathways helps preserve cognitive function in a