"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
Another astronaut from the Gemini program reported waking in the dark during
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showed last 75 words of 1042 total
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.