Markham C H, Diamond S G
Department of Neurology, UCLA School of Medicine 90024-1769.
J Vestib Res. 1993 Fall;3(3):289-95.
Eye torsion was examined in 13 astronaut subjects, tested during repeated episodes of 0 G and 1.8 G in parabolic flight aboard NASA's KC-135. Four findings are included. 1) A strong relationship between previous history of SMS and ocular torsional disconjugacy in novel gravitational states. 2) Responses were unchanged in 4 subjects retested a year later. 3) Ocular torsional disconjugacy scores increased as exposure to 0 and 1.8 G increased. This was particularly evident in subjects who had had SMS. 4) Torsional studies during 10 to 20 parabolas are required to accurately predict SMS. The hypothesis of otolith asymmetry, compensated in 1 G but becoming unmasked in novel gravitational states, is proposed to explain the torsional disconjugacy and ensuing SMS.
对13名宇航员进行了眼扭转检查，他们在美国国家航空航天局（NASA）的KC - 135飞机上进行抛物线飞行时，在多次0G和1.8G的情况下接受测试。研究包括四项发现。1）在新的重力状态下，既往有空间运动病（SMS）病史与眼扭转非共轭性之间存在密切关系。2）一年后重新测试的4名受试者的反应没有变化。3）随着暴露于0G和1.8G的时间增加，眼扭转非共轭性得分升高。这在有过SMS病史的受试者中尤为明显。4）需要在10至20次抛物线飞行期间进行扭转研究，以准确预测SMS。提出耳石不对称的假说，即在1G时得到补偿，但在新的重力状态下变得明显，以解释扭转非共轭性及随之而来的SMS。
