Watt D G
Dept. of Physiology, McGill University, Montreal, Quebec, Canada.
Aviat Space Environ Med. 1987 Sep;58(9 Pt 2):A170-4.
Prolonged exposure to an inappropriate vestibulo-ocular reflex (VOR) will usually lead to motion sickness, and it has been predicted on theoretical grounds that VOR gain may be decreased in weightlessness. While experiments during parabolic flight in aircraft tend to confirm this prediction, experiments during orbital spaceflight have led to apparently contradictory results. It is suggested that VOR gain is reduced initially, but that rapid compensatory mechanisms restore it to normal within minutes of reaching weightlessness. However, even though this process may lead to the rapid return of functionally normal gaze stability, it may not protect against the development of motion sickness.
长时间暴露于不适当的前庭眼反射（VOR）通常会导致晕动病，并且基于理论推测，在失重状态下VOR增益可能会降低。虽然在飞机抛物线飞行期间进行的实验倾向于证实这一推测，但轨道太空飞行期间的实验却得出了明显矛盾的结果。有人提出，VOR增益最初会降低，但在达到失重状态后的几分钟内，快速的代偿机制会使其恢复正常。然而，即使这一过程可能会导致功能上正常的注视稳定性迅速恢复，但它可能无法预防晕动病的发生。
