The comparison of vestibular illusions and vestibular autonomic reactions induced by various speed short arm centrifuge operation

中华航空航天医学杂志 Pub Date : 2014-06-15 DOI:10.3760/CMA.J.ISSN.1007-6239.2014.02.001

Xinliang Song, Yalei Zhou, Y. Geng, Weihua Li, Zenghui Yang

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Abstract

Objective To observe the effects and characteristics of vestibular illusions and vestibular autonomic reactions induced by short arm centrifuge exposure,and to search the appropriate rotation speed of short arm centrifuge for vestibular illusion simulation training on the ground.Methods Ninety healthy pilots were divided into 3 groups by the rotation speed of 21,30 and 37 r/min that generated by SAC-Ⅲ short arm centrifuge.By referencing the vestibular illusions simulation training on electric rotating chair,they were exposure to the simulation of counter-rotatory illusion and Coriolis illusion.Vestibular illusions and vestibular autonomic reactions were compared.Results ①When the speed was 21 r/min,the induced rates of the counter-rotatory illusion,Coriolis tumbling illusion (including head turn to right and to left) and Coriolis somatogyral illusion (including head pitched up and down) were lower than the induced rates under the speed of 30 r/min and 37 r/min (X2＝6.477 20.000,P＜0.01 or P＜0.05).And when the speed was 30 r/min and 37 r/min,the induced rates showed no significant difference (x2 ＝0.073-0.351,P＞0.05).②The expressions and characteristics of the centrifuge evoked counter-rotatory illusion were approximately the same under three different rotation speeds,while the illusion strength was enhanced with the speed increase.The expressions and characteristics of the Coriolis tumbling illusion induced by different speed showed no significant difference (X2 ＝0.090,0.056,P＞0.05).And the expressions of the Coriolis somatogyral illusions were multiform.Under three different speeds,the Coriolis somatogyral illusions showed no significant difference when the pilot's head pitched down (X2 ＝ 1.810,P＞0.05).The case of Coriolis somatogyral illusions was very rare when pilot's head pitched up and the result was not taken into account.③The scores of vestibular autonomic reaction were increased with the rotation speed increase,and showed significant difference (F＝ 15.058,P＜0.01).When the speed was 37 r/min,the score of vestibular autonomic reaction was significantly higher than the scores of 21 r/min and 30 r/min (P＜0.01 or P＜0.05),and there was no significant difference between the scores of 21 r/min and 30 r/min (P＞0.05).Conclusions When the speed of centrifuge was 30 r/m in,the induced rate of the vestibular illusions was the highest and the vestibular autonomic reaction was mild.For the 2 m arm centrifuge,the 30 r/min rotation was appropriate for pilots' vestibular illusion simulation training on the ground. Key words: Centrifugation; Illusion; Vestibule; Coriolis force

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不同转速短臂离心引起的前庭幻觉及前庭自主神经反应的比较

目的观察短臂离心机暴露对前庭错觉及前庭自主神经反应的影响及特点，探讨短臂离心机在地面上进行前庭错觉模拟训练的适宜转速。方法采用SAC-Ⅲ短臂离心机转速分别为21、30、37 r/min，将90名健康飞行员分为3组。参照电动旋转椅前庭错觉模拟训练，分别进行反旋转错觉模拟和科里奥利错觉模拟。比较前庭幻觉和前庭自主神经反应。结果①当速度为21 r/min时，反向旋转错觉、科里奥利翻滚错觉(包括头部向右和向左转动)和科里奥利躯体错觉(包括头部向上和向下倾斜)的诱发率均低于速度为30 r/min和37 r/min时的诱发率(X2=6.477 20.000,P<0.01或P<0.05)。转速为30 r/min和37 r/min时，诱导率差异无统计学意义(x2 =0.073 ~ 0.351,P>0.05)。②在3种不同转速下，离心机引起的反旋转错觉的表达和特征基本相同，错觉强度随转速的增加而增强。不同速度诱导的科里奥利翻滚错觉的表达和特征无显著差异(X2 =0.090,0.056,P>0.05)。科里奥利体感错觉的表现形式是多种多样的。在3种不同飞行速度下，驾驶员头朝下时的科里奥利体感错觉无显著差异(X2 = 1.810,P>0.05)。科里奥利体感错觉的情况是非常罕见的，当飞行员的头倾斜，结果不被考虑在内。③前庭自主神经反应评分随转速升高而升高，差异有统计学意义(F= 15.058,P<0.01)。速度为37 r/min时，前庭自主神经反应评分显著或极显著高于21 r/min和30 r/min (P<0.01或P<0.05)， 21 r/min和30 r/min评分无显著差异(P>0.05)。结论离心转速为30 r/m / min时，前庭幻觉诱导率最高，前庭自主神经反应轻微。对于2 m臂式离心机，30 r/min的转速适合飞行员在地面进行前庭错觉模拟训练。关键词:离心;错觉;技工;科里奥利力

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中华航空航天医学杂志航空航天医学

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期刊介绍： The aim of Chinese Journal of Aerospace Medicine is to combine theory and practice, improve and popularize, actively advocate a hundred flowers bloom and a hundred schools of thought contend, advocate seeking truth from facts, promote the development of the related disciplines of aerospace medicine and human efficiency, and promote the exchange and penetration of aerospace medicine and human efficiency with other biomedical and engineering specialties. Topics of interest for Chinese Journal of Aerospace Medicine include: -The content of the journal belongs to the discipline of special medicine and military medicine, with the characteristics of multidisciplinary synthesis and cross-penetration, and mainly reflected in the aerospace industry, aerospace flight safety and efficiency, as well as the synthesis of special medicine, preventive medicine, environmental medicine, psychology, etc. -Military aeromedicine (Air Force, Navy and Army aeromedicine) and civil aeromedicine, with a balance of aerospace medicine are the strengths of the journal. -The change in aerospace medicine from a focus on promoting physiological compensatory adaptations to enhancing human performance under extreme environmental conditions is what the journal is helping to promote. -The expansion of manuscripts in high altitude medicine is also a special emphasis of the journal.