Zuma E Maia Francisco Carlos, Mangabeira Albernaz Pedro Luiz, Cal Renato, Brusco Thaísa Rodrigues, da Costa Sady Seleiman
Department of Surgery, Federal University of Rio Grande do Sul, Clínica Maia , Canoas, Rio Grande do Sul , Brazil.
Acta Otolaryngol. 2015 Jul;135(7):681-4. doi: 10.3109/00016489.2015.1017889. Epub 2015 Apr 14.
There were no changes in the function of the six semicircular canals in active fighter pilots, through the use of the video head impulse test (vHIT). These results suggest that the vestibuloocular reflex (VOR) works well at the high frequencies related to the natural head movements in this population.
OBJECTIVES/HYPOTHESIS: The vestibular function in pilots has been reported as being different from that of other normal subjects. These differences are attributed to adaptation of the vestibuloocular reflex (VOR) or by habituation. These studies were conducted with caloric and/or rotatory tests and were limited to the lateral semicircular canals. The aim of the present study was to verify the occurrence of high frequency changes in the function of the six semicircular canals in active fighter pilots, through the use of the video head impulse test (vHIT).
Cross-sectional design.
The subjects participating in this study were divided in three groups, according to their flight experience. The control group (Group 1) consisted of 20 soldiers with no experience of in-flight training. For the test subjects 14 fighter pilots were selected and divided into two groups. Group 2 included the pilots with 1000-2000 hours of flight experience and Group 3 included pilots with 2001-3000 hours of flight experience. They were all submitted to a video head impulse test and the gains of the six semicircular canals were analysed.
There were significantly low gain values (p < 0,013) only in the left posterior semicircular canal in the control group as compared with the subject groups. However, there were no significant differences in gain values between the two groups of the active pilots.
通过视频头脉冲试验（vHIT）发现，现役战斗机飞行员的六个半规管功能没有变化。这些结果表明，在前庭眼反射（VOR）与该人群自然头部运动相关的高频情况下，其工作良好。
目的/假设：据报道，飞行员的前庭功能与其他正常受试者不同。这些差异归因于前庭眼反射（VOR）的适应性或习惯化。这些研究采用冷热试验和/或旋转试验进行，且仅限于外侧半规管。本研究的目的是通过视频头脉冲试验（vHIT）验证现役战斗机飞行员六个半规管功能的高频变化情况。
横断面设计。
根据飞行经验，将参与本研究的受试者分为三组。对照组（第1组）由20名没有飞行训练经验的士兵组成。选择14名战斗机飞行员作为测试对象，并将其分为两组。第2组包括飞行经验为1000 - 2000小时的飞行员，第3组包括飞行经验为2001 - 3000小时的飞行员。他们都接受了视频头脉冲试验，并分析了六个半规管的增益。
与受试组相比，对照组仅左侧后半规管的增益值显著较低（p < 0.013）。然而，两组现役飞行员之间的增益值没有显著差异。
