Ristanović Dusan, Martinović Zarko, Jovanović-Cupić Vesna
Department of Biophysics, School of Medicine, Belgrade.
Srp Arh Celok Lek. 2002 Jan-Feb;130(1-2):13-8. doi: 10.2298/sarh0202013r.
In order to quantify the visual reactivity of EEG to opening the eyes, the topography of EEG power spectra in a sample of 72 healthy subjects aged from 7-15 years, was studied. The EEGs were recorder at 14 scalp sites under eyes closed (ECL) and eyes open (EOP). It has been established that the absolute powers in total and in alpha band were significantly higher in all derivations under ECL as compared with EOP condition. Except for the frontal derivations, absolute power in theta band under ECL condition was significantly higher than that under EOP condition. Changes in delta and beta powers were seldom significant. In beta 2 band no EEG blocking was noticed in anterior area. Opening the eyes significantly influenced the values of asymmetry index in alpha band and total power. In all frequency bands and under both conditions, the differences of powers between the hemispheres were found mainly in the prefrontal and laterofrontal areas. The results showed that the visual blocking of EEG was mostly due to a higher degree of EEG desynchronization after opening the eyes.
为了量化脑电图（EEG）对睁眼的视觉反应性，研究了72名年龄在7至15岁的健康受试者样本中EEG功率谱的地形图。EEG在闭眼（ECL）和睁眼（EOP）状态下于14个头皮部位进行记录。已确定，与EOP状态相比，ECL状态下所有导联的总功率和α波段的绝对功率均显著更高。除额部导联外，ECL状态下θ波段的绝对功率显著高于EOP状态。δ和β功率的变化很少显著。在β2波段，前部区域未观察到EEG阻滞。睁眼显著影响α波段不对称指数和总功率的值。在所有频段和两种状态下，半球间功率差异主要出现在前额叶和额外侧区域。结果表明，EEG的视觉阻滞主要是由于睁眼后EEG去同步化程度较高所致。
