招飞体检脑电图闪光诱发技术及鉴定指标研究

Investigation of the technology and assessment standard of EEG photic stimulative activation for pilot selection

目的 改进招飞体检中脑电闪光刺激诱发（photic stimulative activation,PSA）技术,提高空军招飞EEG检查的效率.方法 通过对现行招飞脑电闪光刺激技术的优化,研制新的闪光灯,并在招飞体检中应用验证.结果 新设计的闪光灯与旧的比较,有以下特点：①外形呈弧形设计,扩大了视野覆盖面,增加了发光体部件,增强了闪光亮度,强化了诱发效果,整体上提高了闪光灯的效能;②优化了闪光灯的闪光频率序列,保留了8、10、13、15 Hz,舍去了6、20、30 Hz;③在PSA鉴定EEG指标中,新设备对EEG可疑异常者光驱动反应、倍数反应、异常波的诱发效果显著提高,而在确定为EEG异常者中新旧闪光灯4项EEG指标诱发效果差异无统计学意义;④新闪光灯PSA的光驱动反应持续时间≤5 s的检出率较旧闪光灯提高10％.结论 新闪光灯的PSA技术可显著提高EEG可疑异常检出率,也有助于脑功能稳定性分级.

Objective To improve the technology of photic stimulative activation （PSA） and enhance the efficiency of electroencephalogram （EEG） examination in Air Force pilot selection.Methods A new flashlight for PSA was developed by optimizing the current technology and verified in pilot selection.Results Comparing to the old type the improvements of new flashlight included：① the cambered appearance design enabled wider view field covered,the added LEDs and enhanced photic luminance allowed better evoking effect,and those improved the performance of flashlight.②The photic frequency order was optimized by retaining 8,10,13,and 15 Hz but abandoning 6,20,and 30 Hz.③The new flashlight showed more significant photic evoking effects for the suspended abnormal EEG on such indices as photic driving reaction,multiple reaction and abnormal EEG waveform in PSA assessment.But for the diagnosed abnormal the evoking effects with new flashlight on 4 indices had no significant difference with the old one.④The detection rate of PSA photic driving reaction duration time （≤5 s） evoked by the new flashlight increased by 10% as compared with that evoked by the old one.Conclusions The new PSA technology could significantly enhance the detection rate of the suspended abnormal EEG.It＇s also helpful on effectively grading the stability of cerebral function.