Nikolov N D, Ivanov M, Duridanova V, Aladjov M
Brain Research Institute, Bulg. Academy of Sciences, Sofia.
Act Nerv Super (Praha). 1990 Dec;32(4):241-5.
Using a modification of the computer period analysis of the EEG (Aladjov and Daskalova 1987) we studied the late after-effects (until the 30th min) in human EEG (monopolar leads at F1, C3, P3 and 01) following two kinds of influences: a) short interoceptive one: 3 min hyperventilation (HV) and b) a series of 5 trains of visual light flashes (VS), presented in 5-7 min intervals. The changes in the ongoing EEG in the 2nd min after each VS and in intervals of 5 min after HV were compared with the values before the stimulation. VS did not elicit long-lasting EEG after-effects, which characterized the single interoceptive influence (HV) and consisted mainly of beta-2 (24-36 Hz) EEG activity increase in all studied cortical regions (Nikolov and Kisselkova 1988). Moreover, the exteroceptive stimulation (VS) had no essential influence on the late EEG after-effects after HV, when both kinds of stimulation were applied in the same experiment.
我们采用改良的脑电图计算机周期分析法（Aladjov和Daskalova，1987年），研究了两种影响因素作用于人类脑电图（F1、C3、P3和O1处的单极导联）后的晚期后效应（直至第30分钟）：a）短暂的内感受性影响：3分钟的过度换气（HV）；b）一系列5组视觉闪光刺激（VS），每组刺激间隔5 - 7分钟。将每次VS刺激后第2分钟以及HV刺激后5分钟间隔内的脑电图动态变化与刺激前的值进行比较。VS并未引发长期的脑电图后效应，而单种内感受性影响（HV）则会引发这种效应，其主要特征是所有研究的皮层区域中β - 2（24 - 36赫兹）脑电图活动增加（Nikolov和Kisselkova，1988年）。此外，当在同一实验中同时施加这两种刺激时，外感受性刺激（VS）对HV后的晚期脑电图后效应没有实质性影响。
