Kostandov E A, Zakharova N N, Pogrebinskiĭ S A
Zh Vyssh Nerv Deiat Im I P Pavlova. 1989 Sep-Oct;39(5):803-12.
In elderly people, in comparison with the young ones, the latency of wave P300 is increased in response to all applied acoustic signals, the amplitude of P300 is lower only in response to significant stimuli. No age changes of the wave N150 parameters are noticed. P300 (or N150) wave amplitude depends on signal significance of the sound; it is the lowest in response to significant stimuli and the highest to the ignored ones. Possible reasons of this paradoxical phenomenon are discussed. Preferential participation of different stages of cortical information processing is determined by the difficulty of perceptive task solution. Cortical electrical reaction to separate stimuli is significantly determined by the context of the information perceived in the given period, creating psychological state of the personality.
与年轻人相比，老年人对所有施加的声音信号的P300波潜伏期均增加，仅在对显著刺激作出反应时P300波幅较低。未观察到N150波参数随年龄的变化。P300（或N150）波幅取决于声音信号的显著性；对显著刺激的反应中波幅最低，对被忽略刺激的反应中波幅最高。讨论了这种矛盾现象的可能原因。皮层信息处理不同阶段的优先参与取决于感知任务解决的难度。对单个刺激的皮层电反应显著取决于在给定时期内所感知信息的背景，从而塑造个体的心理状态。
