Diamond S G, Markham C H
Department of Neurology, UCLA School of Medicine 90024-1769.
Aviat Space Environ Med. 1988 Dec;59(12):1158-62.
Four subjects considered resistant to motion sickness were tested in KC-135 parabolic flight to examine ocular torsion at hypo- and hypergravity. Three of these showed no significant torsion at zero G in either the upright position or when tilted 30 degrees to right or left. At 1.8 G in the tilted positions they showed greater ocular counterrolling than at 1 G. None of these three subjects became motion sick. The fourth subject showed eye torsion toward his left in all positions at zero G. This leftward bias could also be seen at 1.8 G when tilted left ear down, the side that induces rightward counterrolling. There he had less eye torsion than at 1 G. This subject became motion sick. All subjects had normal counterrolling in ground-based testing. These results support the hypothesis that asymmetry of the utricular system may be well compensated in the normal 1 G environment, but unmasked in unaccustomed gravitational situations, suggesting a possible predictive test for space adaptation syndrome.
对四名被认为抗晕动病的受试者进行了KC - 135抛物线飞行测试，以检查在低重力和高重力状态下的眼扭转情况。其中三名受试者在零重力下，无论是直立姿势还是向左或向右倾斜30度时，都没有明显的扭转。在倾斜姿势下1.8G时，他们表现出比1G时更大的眼反向转动。这三名受试者都没有晕动病。第四名受试者在零重力下的所有姿势中都表现出眼睛向左扭转。当左耳向下倾斜（这一侧会引起向右的反向转动）处于1.8G时，也能看到这种向左的偏向。在这种情况下，他的眼扭转比1G时少。这名受试者出现了晕动病。所有受试者在地面测试中反向转动均正常。这些结果支持了这样一种假设，即椭圆囊系统的不对称性在正常的1G环境中可能得到很好的补偿，但在不习惯的重力情况下会暴露出来，这表明可能存在一种针对空间适应综合征的预测性测试。
