Motion sickness tends to be regarded as a relatively normal experience. However, if you have already suffered from it, you would know how utterly overwhelming and unpleasant it can be. Motion sickness can hamper travel plans, cause drastic needs in dietary changes and really just ruin your day.
Oftentimes motion sickness is caused by conflicting neural inputs. Your vestibular system is comprised of inputs from your eyes, ears, inner ears, feet, hands and stomach and any part of your body touching a steady or unsteady object. When one system is over or underdeveloped they can send conflicting messages to your brain resulting in nausea and cognitive overwhelm.
There aren't many species in the animal kingdom that live their lives upright. One of the largest reasons for this is because it takes an immense amount of energy to receive and translate all the inputs from so many sources. If your vestibular system is inefficient, you could be working twice as hard as necessary just to keep your body upright without even knowing it! Now imagine trying to write a 10-page essay or plan a wedding when your mind is hard at work just keeping you vertical. It sounds a lot harder, doesn't it?
While unpleasant at first, Vestibular exercises that make your system more efficient and are a surefire way to open up more "processing power" for your brain. Not everyone needs it, but those that do notice a difference in 2-4 weeks.