The brain loses its ability to anticipate what the vehicle will do next
À medida que os veículos elétricos ganham espaço nas estradas do mundo, os passageiros descobrem que o progresso tecnológico pode trazer consigo um custo inesperado: a náusea. O silêncio e a suavidade que definem estes automóveis — qualidades celebradas como virtudes — privam o sistema nervoso dos sinais sensoriais que décadas de viagens em carros a combustão ensinaram o cérebro a esperar. É um paradoxo da modernidade: quanto mais refinada a máquina, mais desorientado o corpo humano que a habita.
- Passageiros de veículos elétricos relatam náuseas, tonturas e suores frios em viagens que, em carros tradicionais, decorreriam sem qualquer desconforto.
- A ausência do ronco do motor e das vibrações do chassis priva o cérebro dos avisos sensoriais que usa para antecipar acelerações e travagens — criando um conflito entre o que o corpo sente e o que o cérebro esperava sentir.
- A travagem regenerativa, que desacelera o veículo de forma prolongada e suave, agrava o problema ao contradizer os padrões de travagem que os passageiros interiorizaram ao longo de anos.
- Os condutores raramente sofrem este efeito, pois antecipam os movimentos pelas suas próprias ações; são os passageiros — passivos e dependentes dos sinais do veículo — os mais vulneráveis.
- Fabricantes e investigadores trabalham já em soluções como vibrações programadas nos bancos e sinais visuais no painel, procurando devolver artificialmente a coerência sensorial que os carros a combustão ofereciam quase por acidente.
Os passageiros de carros elétricos estão a reportar algo inesperado: uma onda de náusea que não sentem em veículos tradicionais. O problema não está na viagem em si, mas naquilo que lhe falta. Investigadores como William Emond, da Université de Technologie de Belfort-Montbéliard, em França, têm estudado a forma como o cérebro processa o movimento nestes veículos — e a conclusão aponta para uma falha fundamental. Durante décadas, o sistema nervoso humano aprendeu a reconhecer os sinais dos motores a combustão: o rumor do motor, as vibrações que percorrem o chassis e os bancos. Os elétricos eliminam quase todos esses sinais.
Sem esses pontos de referência, o cérebro perde a capacidade de antecipar o que o veículo fará a seguir. Não consegue preparar-se para a aceleração nem para a travagem, porque os avisos sensoriais em que aprendeu a confiar simplesmente desapareceram. O resultado é um conflito entre expectativa e realidade, ao qual o corpo responde com tonturas, náuseas e suores frios — os sintomas clássicos da cinetose.
Um dos principais responsáveis identificados é a travagem regenerativa, que recupera energia durante a desaceleração para recarregar a bateria. Este sistema cria uma travagem suave e prolongada, muito diferente dos padrões mais bruscos e familiares dos veículos a combustão. Um estudo de 2024 confirmou que níveis mais elevados de travagem regenerativa se correlacionam diretamente com um aumento dos sintomas de cinetose. Os condutores raramente sofrem este problema — antecipam os movimentos pelas suas próprias ações —, mas os passageiros, inteiramente dependentes dos sinais do veículo, ficam vulneráveis.
A resposta da indústria passa por reintroduzir artificialmente os sinais sensoriais perdidos: vibrações programadas nos bancos, indicações visuais no painel e outros mecanismos de feedback que ajudem os passageiros a antecipar os movimentos do veículo. O objetivo é restaurar a coerência sensorial que os carros tradicionais proporcionavam, quase sem querer.
Passengers climbing into electric cars are reporting something unexpected: a wave of nausea that doesn't hit them in traditional vehicles. The culprit isn't the ride itself, but what's missing from it. Scientists have begun mapping the problem, and the answer lies in the gap between what our bodies feel and what our brains expect.
As electric vehicles claim an expanding share of the global market, complaints from queasy passengers have grown louder. The phenomenon is real enough that researchers have started investigating why the transition from combustion engines to battery power seems to trigger motion sickness in ways that older cars do not. William Emond, a doctoral researcher at the Université de Technologie de Belfort-Montbéliard in France, has been studying how the brain processes movement in these newer vehicles. His work points to a fundamental problem: most people's nervous systems have been trained, over decades, to recognize the specific signals that come with traditional engines—the rumble of the motor, the particular vibrations that travel through the chassis and seats. Electric cars strip away nearly all of these cues.
Without those familiar anchors, the brain loses its ability to anticipate what the vehicle will do next. It cannot brace for acceleration or prepare for braking because the sensory warnings it has learned to depend on have vanished. The result is a mismatch between expectation and reality, and the body responds with dizziness, nausea, and cold sweats—the classic symptoms of motion sickness, or cinetose, as researchers call it.
One particular culprit has emerged in recent studies: regenerative braking. This system, which captures energy during deceleration to recharge the battery, creates a smooth, drawn-out slowdown that feels fundamentally different from the sharper, more familiar braking patterns of combustion vehicles. A 2024 study found that higher levels of regenerative braking correlate directly with increased motion sickness symptoms. The seat vibrations that passengers have come to expect are also largely absent, leaving the sensory landscape eerily quiet and still.
The core issue is sensory conflict. The brain receives competing signals from the eyes, the inner ear, and the body's sense of position and movement. When these signals don't align with what the brain predicted, the nervous system treats it as a threat—something is wrong, something is out of sync. The body responds with discomfort.
Interestingly, drivers almost never experience this problem. The person at the wheel can anticipate turns, braking, and acceleration through their own actions and visual cues. Passengers, by contrast, are passive observers, entirely dependent on the vehicle's signals to prepare their bodies for what comes next. In an electric car, those signals have largely disappeared.
Manufacturers and researchers are now working on solutions. Some of the most promising approaches involve adding back artificial sensory cues—programmed vibrations in the seats, visual signals on the dashboard, or other feedback mechanisms designed to help passengers anticipate the vehicle's movements before they happen. The goal is to bridge the gap between what the body feels and what the brain expects, restoring the sensory coherence that traditional cars provided almost by accident.
Notable Quotes
Most people have grown accustomed throughout their lives to the typical signals of combustion cars, such as engine sound or certain vibrations. In electric vehicles, these cues almost disappear.— William Emond, doctoral researcher, Université de Technologie de Belfort-Montbéliard
The Hearth Conversation Another angle on the story
Why does the brain need these warning signals? Can't it just adapt to the new sensation?
The brain is built on prediction. It's constantly trying to forecast what will happen next so the body can prepare. When you've spent forty years feeling engine vibrations before acceleration, your nervous system learns that pattern. Strip it away, and the brain is flying blind—it can't brace, can't anticipate, so the inner ear and the eyes send conflicting messages.
So it's not the electric car itself that's the problem. It's the absence of something.
Exactly. The car is smoother, quieter, more refined. But from the passenger's perspective, it's also more alien. The body doesn't know what to expect.
Why don't drivers get sick?
Because they're creating the movement themselves. They feel the steering wheel, they press the pedals, they see the road ahead. They're not surprised by anything because they're the ones making it happen.
Can you really fix this with artificial vibrations?
That's what they're testing now. If you can give passengers a heads-up—a little buzz in the seat before the car slows down—the brain gets the warning it needs. It's like adding back the engine sound, but electronically.
Does this mean electric cars will always make some people sick?
Not necessarily. As more people grow up in electric vehicles, their brains will learn the new patterns. The next generation won't have decades of combustion-engine expectations to unlearn. But for now, yes, there's a real gap between what we're used to and what we're experiencing.