Effect of visual illusion, circularvection, in flight simulator on posture control

Occurrence of circularvection and the disturbance of postural control in the fighter flight simulator were studied. The sensation of self-motion, circularvection, in the fighter flight simulator flying in a low-altitude and high-speed (but motionless base) was positive in all of four healthy male adult volunteers. Marked body staggering in the standing test was noted at post-flight. Square Drawing Test (hand writing test) showed some tendency of prolongation of lines, suggesting mis-calibration of fine hand-arm motor control. Nystagmic eye movement, optokinetic, was recorded on ENG during this motionless flight simulator, which increased on banking.