The Influence of Short-Time Head-Down Tilt Simulated Weightlessness on Performance of Motion Direction Judgment

Objective To explore the influence of short-time head-down tilt simulated weightlessness on the performance of motion direction judgment. Methods Eighty subjects were randomly divided into two groups. Two groups were required to judge the motion direction under the conditions of natural gravity and short-time head-down tilt simulated weightlessness, respectively. Results The main effect of motion directions is significant. The performance of judging the upward, downward, rightward, and leftward motion is different. The interactive effect between gravity conditions and motion directions is significant. Angular deviation of judging the upward motion is significantly larger under simulated weightlessness condition compared to natural gravity condition. Conclusion There is a difference in judging different motion directions. Different gravity conditions only influence specific motion direction, and perceptive deviation of the upward motion is larger under simulated weightlessness condition.