头低位卧床对正常人视觉诱发电位的影响  

The Influence of Head-down Tilt on the Visual Evoked Potential of Healthy People

作　　者：赵军[1] 胡莲娜[1] 李志生[1] 梁会泽[1] 闫洪欣[1] 仇长宇[1] 

机构地区：[1]中国人民解放军306医院,北京100101

出　　处：《航天医学与医学工程》2009年第3期169-171,共3页Space Medicine & Medical Engineering

基　　金：全军"十一五"科技攻关项目(06G003)

摘　　要：目的观察头低位卧床条件下正常人视觉诱发电位的变化。方法选取6名男性健康志愿者,-6°头低位卧床模拟失重状态,在实验前、实验第2天及第5天测量双眼在不同空间频率下的视觉诱发电位P100波。结果在不同空间频率下,视觉诱发电位P100波潜伏期在实验前后无明显差异,P100波波幅在高空间频率下有显著改变,结果具有统计学意义(P<0.01),在中空间频率及低空间频率下无显著差异。结论头低位卧床条件下可导致高空间频率下的视觉诱发电位改变,提示失重对于正常人视功能可能存在一定的影响。Objective To observe the influence of head-down tilt on visual evoked potential. Methods Six healthy volunteers were exposed to -6°head-down tilt. The visual evoked potential were measured before the test, the second day and the fifth day of the test under different space frequency. Results No significant difference was found in the latency of P100 before and after the test. The amplitude of P100 had significant change under high space frequency. But not the same happened on middle and low space frequency. Conclusion head-down tilt can induce the change of visual evoked potential under high space frequency, which means the weightlessness may influent the visual function.

关 键 词：头低位倾斜 卧床实验 视觉诱发电位 视功能 

分 类 号：R852.4[医药卫生—航空、航天与航海医学]