Your eyes are telling you you’re in free flight, but the seat of your pants is saying you’re not going anywhere,” says Timothy Hain, an otoneurologist and professor emeritus at Northwestern University, describing another mismatch scenario in which people get motion sick-while looking at screens. “Another place might be, you’re sitting in a movie theater, and you see a plane going over a cliff. And if someone’s eyes tell him one thing-“I am sitting still in a car,” for instance-and his ears tell him another-“I’m careening down the Autobahn at 100 miles an hour”-that mismatch can cause a problem. The inner ear is the seat of the vestibular system, which deals with movement and balance. To keep our balance while navigating the world, humans use their eyes, ears, feet, maybe hands if they’re babies who can crawl. The prevailing theory of what causes the dizziness, headaches, and nausea of motion sickness is that riding in vehicles, or on camels, causes confusion between some of the senses. (And, apparently, camels?) If someone's eyes tell him one thing and his ears tell him another, that mismatch can cause a problem. While anybody can get motion sick, with sufficient motion, there’s still much left unknown about why some people are more likely to get sick on boats-and cars, and planes, and carnival rides, and tire swings. A recent study by genetics company 23andMe, published in Human Molecular Genetics, sheds some light on genetic factors associated with motion-sickness, supporting some existing theories about what parts of the body are involved in the phenomenon. Why people get motion-sick is a mystery, and how motion-sickness works is less of a mystery, but more of a debate. “If it was not for sea-sickness, the whole world would be sailors.” Even farther back, Greek physician Hippocrates presaged our current term, “motion sickness,” writing, “sailing on the sea proves that motion disorders the body.” ![]() “The misery I endured from sea-sickness is far far beyond what I ever guessed at,” Charles Darwin once wrote to his father. For so long as man has attempted to tame and traverse the sea, the sea has punished him for it. Humans have explored a mere five percent of the oceans over the long and storied history of seafaring, and even this knowledge has come at a cost. In some cases, the nature of the item means that it is non-returnable, for example, due to hygiene/health and personal care/wellness/consumable nature of the product.The wide expanse of blue water that covers most of this world holds many mysteries. Office Products and Wireless Returns Policy New electronic items fulfilled by Amazon AU can be returned for change of mind, for a replacement or a full refund of the purchase cost of the item within 30 days of receipt of delivery.For information about returning faulty electronics please see Returning Faulty Items. Please see our Amazon Global Store Returns policy and Refunds policy for more information about returning Amazon Global Store items.Ĭamera, Electronics and PC Returns Policy Please see About Marketplace Returns & Refunds for details on Seller returns policies. ![]() To return faulty items see our Returning Faulty Items policy.įor items ordered on from a seller that fulfils and ships its own inventory (also called a third party seller), any returns will be in accordance with the returns policy set by that seller (not the Amazon AU returns policies). ![]() This change of mind return policy is in addition to, and does not affect your rights under the Australian Consumer Law including any rights you may have in respect of faulty items. Unless otherwise stated, original shipping fees for change of mind returns are not refunded. Please Contact Us and see About Items That Can’t Be Returned. In some circumstances, these items may be eligible for a refund or a replacement (for example, if you receive the wrong item due to an Amazon AU error or if the item is faulty). In some cases, the nature of the item means that it is non-returnable, for example, due to hygiene/health and personal care/wellness/consumable nature of the product. ![]() You can return most new, unopened items fulfilled by Amazon AU within 30 days of receipt of delivery for a replacement or full refund of the price you paid for the item if you change your mind - see About Replacements and About Refunds.
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