摘要
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。
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.
出处
《中华耳科学杂志》
CSCD
2006年第4期272-275,共4页
Chinese Journal of Otology
