高过载引起前庭功能紊乱的初步观察

目的探讨高过载导致的前庭功能紊乱（G—VD）的发生机理。方法观察11名飞行员于静止头直位高过载暴露前后的自发性眼震（SN）、变位性眼震（PN）、前庭眼动反射（VOR）、视动性眼震（OKN）、视前庭相互作用反射（VVOR）和主观视觉垂直线（SVV）变化情况，以及6名地面人员于左转抬头的动头模式下4．5G过载暴露前后的SN和PN变化情况。结果11名飞行员过载暴露前后各指标未见明显变化，6名地面人员于动头模式下暴露后有2名出现SN和PN。结论地面模拟飞行中过载作用条件下，如头位静止不会诱发G—VD；G—VD的发生可能与受试者在过载环境下是否动头有关，过载环境下动头更易诱发G—VD。

A primary observation of G-induced vestibular dysfunction

Objective To investigate changes in human vestibular function after simulated aviation high-G exposure and explore the mechanisms of G-induced vestibular dysfunction. Methods Spontaneous nystagmus(SN), positioning nystagmus(PN), vestibular-ocular reflex (VOR), optokinetic nystagmus (OKN), vestibular-vision ocular reflex (VVOR) and subjective vision vertical (SVV) of eleven pilots were tested before and after high-G exposure with their heads holding erect and still. SN and PN of six ground personnel without flying experience were tested before and after 4.5 G exposure with a head movement of looking up and left. Results No vestibular function changes were found in the 11 pilots before and after high G exposure with the head still. Positive SN and PN were found in two of the six ground personnel with head movement. Conclusion G-induced vestibular dysfunction(G-VD) will not occur under simulated G environment while the subjects' heads holding still, but it is related with the subjects' head movement. Head movement in high G environment can increase the probability of G-VD. [