When people go up into space, many will immediately get space sickness. This essay will reveal some of the symptoms and the measures that can be taken to control it.
"The first night in space when I was drifting off to sleep," recalled one Apollo astronaut, "I suddenly realized that I had lost track of ... my arms and legs. For all my
mind could tell, my limbs were not there. However, with a conscious command for an arm or leg to move, it instantly reappeared -- only to disappear again when I
relaxed."
Another astronaut from the Gemini program reported waking in the dark during …
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…on different tricks to establish a common
sense of "up". For example, all of the modules on the ISS will have a consistent "up" orientation. And the writing on the walls points in the same direction, too.
Despite space sickness and occasional disorientation, living in space must also be a lot of fun!
Fortunately, the brain quickly adapts. It learns to trust the eyes and reprograms signals from the vestibular system to reconcile the mismatch.
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