By The Chronicle Staff

For decades, manual transmissions have been praised for making driving more engaging. Enthusiasts love the extra level of control, the satisfaction of rowing through the gears, and the feeling of being connected to the car.

Now, new research suggests there may be another benefit to driving a stick shift — keeping your brain active.

A recent study led by Japanese neuroscientist Professor Ryuta Kawashima of Tohoku University found that operating a manual transmission stimulates the brain's prefrontal cortex, an area responsible for memory, attention, decision-making and problem-solving.

Professor Kawashima is well known for his work in brain training and helped develop Nintendo's popular Brain Age games. According to the research, the coordination required to operate a clutch, shift gears, monitor traffic and control speed creates a continuous mental workout that automatic transmissions simply don't demand.
Driving a manual requires multiple tasks to happen simultaneously. Drivers must anticipate traffic conditions, select the appropriate gear, balance clutch engagement, modulate the throttle and remain constantly aware of their surroundings. These actions force the brain to process information quickly and efficiently, helping keep neural pathways active.

Researchers believe this type of regular mental engagement may contribute to maintaining cognitive function as people age.

While the study does not claim that driving a manual transmission prevents dementia, it suggests that the additional cognitive workload may provide benefits similar to other activities that challenge the brain, such as learning a musical instrument, solving puzzles or playing strategy games.

The timing of the study is interesting because manual transmissions have become increasingly rare. In the United States, less than one percent of new vehicles sold are equipped with a manual gearbox. Many automakers have eliminated the option entirely as automatic transmissions have become more efficient, quicker and easier to drive in everyday traffic.

Enthusiast vehicles such as sports cars and a handful of performance models remain among the few places where buyers can still find three pedals.

Of course, there are practical reasons why automatics dominate today's roads. Modern automatic transmissions offer better fuel economy, smoother operation in stop-and-go traffic and advanced driver assistance features that often rely on automatic gear selection.

For many drivers, convenience outweighs the enjoyment of shifting gears.
Still, the study highlights an interesting point about modern life. As technology continues to automate more of our daily routines, many of the small mental challenges we once performed without thinking are disappearing.

GPS has replaced paper maps. Smartphones remember phone numbers. Voice assistants answer questions instantly. Driving an automatic removes another task that once required constant attention.

Whether you're driving a classic muscle car, a vintage pickup, or a modern sports coupe with a six-speed manual, every shift may be doing more than moving the car down the road— it could also be giving your brain a little exercise.

So if you've ever wondered whether teaching your teenager to drive a stick shift is worth the effort, science may have just given you another reason to hand them the keys. ■