Phát âm chuẩn – Anh ngữ đặc biệt: Motion Sickness Device (VOA)

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Some people get motion sickness from being in moving vehicles such as cars or airplanes. But, a new device could stop motion sickness by suppressing some signals in the brain. Motion sickness happens when the motion you sense with your inner ear is different from the motion you see. Symptoms of motion sickness are dizziness, nausea and vomiting. People have tried different ways to prevent the condition, including wrist bands and anti-nausea drugs. But often, nothing works. Now, scientists at Imperial College London are working on a device to counteract motion sickness. Michael Gresty is an expert on the condition. He says riding in a car or a ship can make it difficult for some people to know what is upright and how to best deal with it. The device sends a weak electrical current through electrodes placed on a person’s head. The electric current appears to cause the brain to suppress signals that affect the inner ear. Researcher Qadeer Arshad says the scientists found “that it took longer for the individual to develop motion sickness and that they also recovered faster.” The next step is to test the device outside the laboratory. Michael Gresty says there are no reports of unwanted side effects from the small amounts of electricity released by the device. The researchers hope a device that plugs into a smart phone and attaches to the head will be available within 10 years.

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