Geva Gil, Getter Nir, Blecher Boris, Ben-Ari Oded, Gordon Barak, Nakdimon Idan, Shriki Oren
Department of Cognitive and Brain Sciences, Ben-Gurion University of the Negev, 1 Ben-Gurion Blvd, Beer-Sheva, Israel.
The Israeli Air Force Aeromedical Center, Tel-Hashomer, Ramat Gan, Israel.
Sci Rep. 2025 Jan 11;15(1):1682. doi: 10.1038/s41598-025-85219-4.
During flight, spatial disorientation (SD) commonly occurs when a pilot's perception conflicts with the aircraft's actual motion, attitude, or position. A prevalent form of SD is the somatogyral illusion, which is elicited by constant speed rotation and causes a false perception of motion in the opposite direction when the rotation ceases. This research aimed to investigate changes in brain activity that occur when experiencing a somatogyral illusion by simulating conditions closely mimicking flight conditions to gain insight into how to better manage this illusion during flight. In the study, 23 volunteers were isolated from external stimuli to promote somatogyral illusion induction while seated in a Barany (rotating) chair. The study employed electroencephalogram (EEG) and eye-tracking glasses to monitor brain activity and eye movements, respectively. Participants reported their perceived motion direction using a joystick, allowing us to compare a reference condition to that of the illusion. Results indicate a significant decrease (34%) in theta power (4-7.5 Hz) over the left frontal region during the illusion, complemented by the occurrence of nystagmus in 72% of the trials. These findings align with previous studies linking SD and theta band changes, suggesting implications for EEG-based identification of SD in flight.
在飞行过程中，当飞行员的感知与飞机的实际运动、姿态或位置发生冲突时，空间定向障碍（SD）通常就会出现。空间定向障碍的一种常见形式是躯体旋转错觉，它由匀速旋转引发，当旋转停止时会导致相反方向的错误运动感知。本研究旨在通过模拟与飞行条件极为相似的环境来探究在体验躯体旋转错觉时大脑活动的变化，以便深入了解如何在飞行中更好地应对这种错觉。在该研究中，23名志愿者坐在巴纳尼（旋转）椅上，与外界刺激隔离开来，以促使躯体旋转错觉的产生。该研究分别使用脑电图（EEG）和眼动追踪眼镜来监测大脑活动和眼球运动。参与者通过操纵杆报告他们感知到的运动方向，这使我们能够将参照状态与错觉状态进行比较。结果表明，在产生错觉期间，左额叶区域的θ波功率（4 - 7.5赫兹）显著下降（34%），并且在72%的试验中出现了眼球震颤。这些发现与之前将空间定向障碍和θ波段变化联系起来的研究结果一致，表明其对基于脑电图识别飞行中的空间定向障碍具有启示意义。
