Lackner J R, Teixeira R A
Aviat Space Environ Med. 1977 Mar;48(3):248-53.
Symptoms of motion sickness are sometimes experienced during exposure to optokinetic stimulation. Two experimetns were performed to compare the symptoms of motion sickness elicited when subjects were exposed to incremental changes in optokinetic stimulation while sitting passively and while continuously executing shoulder-to-shoulder head movements. In the first experiment, a fixed head-movement frequency (20 cpm) was used, wheras in the second the subjects varied the frequency of their head movements in order to maintain suppression of illusory self-rotation. In both experiments, subjects in the head-moving condition had fewer and less severe symptoms of motion sickness and experienced illusory self-rotation after longer exposure times and at higher optokinetic velocities than in the head-stationary condition. Subjects in th- head-movement condition of the second experiment increased the frequency of their head movements as the velocity of optokinetic stimulation increased. The symptoms of motion sickness elicited during optokinetic stimulation tended to be dizziness, headache, eye-strain, and stomach awareness appearing in no fixed order. The pattern and constellation of symptoms are unlike those elicited by vestibular stimulation.
在接受视动刺激时，有时会出现晕动病症状。进行了两项实验，以比较受试者在被动坐着以及持续进行肩并肩头部运动时，暴露于视动刺激增量变化下所引发的晕动病症状。在第一个实验中，使用了固定的头部运动频率（每分钟20次），而在第二个实验中，受试者改变头部运动频率以维持对虚幻自我旋转的抑制。在两个实验中，与头部静止状态相比，头部运动状态下的受试者晕动病症状更少且更轻，并且在更长的暴露时间和更高的视动速度下才会出现虚幻自我旋转。第二个实验中处于头部运动状态的受试者随着视动刺激速度的增加而提高了头部运动频率。视动刺激期间引发的晕动病症状往往是头晕、头痛、眼疲劳和胃部不适，出现顺序不固定。症状的模式和组合与前庭刺激引发的不同。
