正常青年人脑电图光驱动反应性别差异的初步研究

Study of sex differences in EEG response to photic driving in normal young adults

目的 :研究正常青年脑电图光驱动反应的性别差异 ,探讨光刺激对视觉系统的影响。方法 :对年龄为 2 1～ 2 5岁的正常健康者男 35例 ,女 33例 ,记录安静状态下脑电图 ,并进行闪光刺激。闪光刺激的频率为 5、10和 15Hz。将安静状态和闪光刺激中的脑电图功率值变为波幅 ,对男女两组进行比较。结果 :安静状态下 ,在 β1和 β2 波带女性比男性有较高的波幅 (P <0 0 5 ) ;而在δ、θ、α1、α2 波带的差异无显著意义。闪光刺激中 ,15Hz光刺激相对应的β带域 (14 5～ 15 5Hz)的波幅差异更显著 ,在所有部位都有显著意义 (P <0 0 5 )。结论 :视觉系统存在性别差异 。

Objective:To study the sex differences in EEG response to photic driving in normal young adults,and to explore the effects of photic stimulation on visual system.Methods: A routine EEG was recorded in 35 male normal subjects and 33 female ones at the age of 21～25 years old,and then photic stimulation was given.The frequencies of photic stimulation were 5?10 and 15Hz.The power values of EEG in resting state and photic stimulation were changed into wave amplitudes,and then the EEG amplitudes of male group was compared with those of female group.Results:In resting state,EEG showed a higher amplitude in β 1 and β 2 band at the limited electrode sites in females than in males.There was no significant difference in δ?θ?α 1 and α 2 band.The amplitude difference in the beta band corresponding to photic stimulation at 15Hz was more significant during photic stimulation.A significant difference was noted in all sites.Conclusions:Sex differences might exist in the function of visual system,and females might have higher susceptibility to photic stimulation than males.