Space Sickness - Uchuuyoi (English spelling) space-sickness

Japanese: 宇宙酔い - うちゅうよい（英語表記）space-sickness

Symptoms similar to seasickness occur when one is exposed to the effects of weightlessness for a long period of time, and include dizziness, nausea, sweating, and drooling. Soviet cosmonaut GS Titov was the first to suffer from it while flying on Vostok 2. Just as some people are more susceptible to seasickness than others, there are individual differences in space sickness, and symptoms also vary. It is thought to occur when the gravity sensors in the otolith organs stop working when one is exposed to weightlessness.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

長時間にわたって無重量の影響下におかれたときに起る船酔いに似た症状で，めまい，吐き気，発汗，よだれなどを伴う。ソ連の宇宙飛行士 G.S.チトフが『ボストーク』2号で飛行中，初めてかかった。宇宙酔いは船酔いにかかりやすい人とかかりにくい人がいるように，個人差があり，症状も異なる。無重量状態になって耳石器に備わった重力センサが働かなくなることによって起ると考えられている。

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