Srebro R
Electroencephalogr Clin Neurophysiol. 1982 Dec;54(6):707-10. doi: 10.1016/0013-4694(82)90125-0.
Intertrial EP variance measured in response to a brief binocularly presented flash of light decreases with a time-course that overlaps the average EP. This decrease in variance is not exclusive to the alpha frequency band (8-12 c/sec) but it is selective for it. Subjects with large initial variance tend to show a large decrease in variance. There is no relationship between the magnitude of the decrease in variance and the consistency of the EP. The phenomenon reflected by the decrease in variance is probably identical with 'event-related desynchronization.' The results support the hypothesis that an EP may consist of two processes that overlap in time: a reduction in background EEG activity and an almost deterministic transient potential change.
在对双眼短暂呈现闪光的反应中测量的试验间诱发电位（EP）方差随时间进程降低，该时间进程与平均EP重叠。这种方差的降低并非仅局限于α频段（8 - 12次/秒），但对其具有选择性。初始方差较大的受试者往往方差降低幅度也较大。方差降低的幅度与EP的一致性之间没有关系。方差降低所反映的现象可能与“事件相关去同步化”相同。这些结果支持这样一种假设，即诱发电位可能由两个在时间上重叠的过程组成：背景脑电图活动的减少和几乎确定性的瞬态电位变化。
