Objective Electroencephalogram(EEG) is a modem examination method, which amplifies tiny bioelectrical signals of brain itself. This study focused on the differences of seven EEG spectral regional field powers: Delta(0.5 ~3.5 Hz), Theta(4 -7 Hz) , Alpha-1 ~ (7.5~9.5 Hz) , Alpha-2( 10 ~ 12 Hz), Beta-l(13~23 Hz), Beta-2(24~34 Hz) and Gamma (35 ~ 45 Hz)) when the unilateral eye(rigjit and left eye) is open and closed. Methods Fifteen healthy subjects (all were men; age: 19 -27 years), in the resting state, in a quiet and comfortable room, who were asked to close and open unilateral eye( left-closed/open, right-closed/open) in counter-balanced order stimulation, while respective EEG was recorded and analyzed. Results In the resting state, regional EEG field powers of mid -frequency band Alpha-1 and Alpha-2 field powers were obviously higher in eyes-closed than in eyes-open state(Alpha-1, P= 0.038; Alpha-2, P = 0.02), Compared unilateral eye-closed and eye-open, there were no significant differences in alpha bands or other bands. Conclusion Alpha band power was significantly higher when subjects closed eyes than opened their eyes, however, when we compared unilateral eye-closed and eye-open differences of seven bands, significant differences was uncovered. We conclude that bilateral EEG powers are balanced via corpus callosum in persistent 2 min unilateral stimulation.%目的 脑电图(electroencephalogram,EEG)是通过脑电描记仪将脑自身微弱的生物电放大记录成为一种脑电谱图,以帮助诊断疾病的一种现代辅助检查方法.早期对闭眼和睁眼差异的研究结果多集中在位于枕叶-顶叶的α波的幅度的变化,闭眼幅度大于睁眼.本文主要探讨单侧眼睛(左眼和右眼)分别睁开和闭合时所引起的七波段脑电图谱:Delta(0.5～3.5 Hz),Theta(4～7 Hz),Alpha-1 (7.5～9.5 Hz),Alpha-2( 10～12 Hz),Beta-1(13～23Hz),Beta-2(24～34 Hz) and Gamma(35～45 Hz)的差异.方法 受试者为15名健康男性(年龄19～27岁),静息状态下,在安静舒适的室内环境中,将随机单侧睁眼闭眼(左开/左闭,右开/右闭)作为刺激,采用电脑自动记录七波段脑电图(128-导EEG).结果 静息状态下的脑电区域能量:中间频率波段alpha-1与alpha-2闭眼时明显高于睁眼时( alpha-1,P =0.038；alpha-2,P=0.02),而比较单侧睁眼闭眼alpha-1与alpha-2时,差异无统计学意义(alpha-1,P =0.502；alpha-2,P=0.984),其他波段差异无统计学意义.结论 闭眼情况下α波功率显著高于睁眼,而在比较七波段单侧眼睛睁闭时,差异无统计学意义,说明单侧外界光线刺激引起的对侧大脑半球及视觉皮质的变化,经过视交叉传入,胼胝体整合两边的头脑反应是一种持续性变化(2 min),从而使两侧EEG区域能量图一致.
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