Klimesch Wolfgang, Schack Bärbel, Schabus Manuel, Doppelmayr Michael, Gruber Walter, Sauseng Paul
Department of Physiological Psychology, University of Salzburg, Institute of Psychology, Hellbrunnerstr. 34, A-5020 Salzburg, Austria.
Brain Res Cogn Brain Res. 2004 May;19(3):302-16. doi: 10.1016/j.cogbrainres.2003.11.016.
An oscillatory phase resetting model is presented and data are reported which indicate that early components of the event-related potential are due to the superposition of evoked oscillations. The following hypotheses were tested and could be confirmed: (i) theta and alpha show a significant increase in phase locking during the time window of the P1 and N1 as compared to a prestimulus reference, (ii) the dynamics of event-related changes in evoked theta and alpha power obey the same principles as are known from event-related de-/synchronization research, and (iii) latency measures of the P1-N1 complex are negatively correlated with individual alpha frequency. In addition, we have found that theta phase locking is larger during encoding than recognition and that good memory performers show a larger increase in theta and alpha phase locking during recognition in the time window of the N1. Our general conclusion is that the P1-N1 complex is generated primarily by evoked alpha and theta oscillations reflecting the synchronous activation of a working- and semantic memory system.
本文提出了一种振荡相位重置模型，并报告了相关数据，这些数据表明事件相关电位的早期成分是由诱发振荡的叠加所致。以下假设经过了检验并得到证实：（i）与刺激前参考相比，在P1和N1的时间窗口内，θ波和α波在锁相方面有显著增加；（ii）诱发的θ波和α波功率的事件相关变化动态遵循与事件相关去同步/同步研究中已知的相同原则；（iii）P1-N1复合体的潜伏期测量值与个体α频率呈负相关。此外，我们发现编码期间的θ波锁相比识别期间更大，并且在N1的时间窗口内，记忆表现良好者在识别期间θ波和α波锁相的增加更大。我们的总体结论是，P1-N1复合体主要由反映工作记忆和语义记忆系统同步激活的诱发α波和θ波振荡产生。
