DiZio P, Lackner J R, Evanoff J N
Ashton Graybiel Spatial Orientation Laboratory, Brandeis University, Waltham, Massachusetts 02254.
Aviat Space Environ Med. 1987 Sep;58(9 Pt 2):A218-23.
Susceptibility to motion sickness during exposure to constant levels of Coriolis, cross-coupling stimulation is lower in zero G and higher in 1.8 G than in a 1-G force environment (10, 13). The goal of the present experiment was to determine whether gravitoinertial force magnitude also influences oculomotor and perceptual responses to Coriolis, cross-coupling stimulation. We had blind-folded subjects who were rotating at constant velocity make standardized head movements during the free-fall and high force phases of parabolic flight, and we measured both the characteristics of their horizontal nystagmus and the magnitude of their experienced self-motion. Both responses were less intense in the free-fall periods than in the high force periods. Although the slow phase velocity of nystagmus reached the same initial, peak level in both conditions, it decayed more quickly in zero G. These findings suggest that the response to semicircular canal stimulation depends on the background level of gravitoinertial force.
在暴露于恒定水平的科里奥利交叉耦合刺激时，晕动病易感性在零重力环境下较低，在1.8G环境下比在1G力环境下更高（10, 13）。本实验的目的是确定重力惯性力大小是否也会影响对科里奥利交叉耦合刺激的眼动和感知反应。我们让在匀速旋转的蒙眼受试者在抛物线飞行的自由落体和高重力阶段进行标准化头部运动，并测量了他们水平眼震的特征以及他们所体验到的自身运动的大小。两种反应在自由落体阶段都比在高重力阶段弱。尽管眼震的慢相速度在两种情况下都达到了相同的初始峰值水平，但在零重力环境下它衰减得更快。这些发现表明，对半规管刺激的反应取决于重力惯性力的背景水平。
