Phase-locked alpha and theta oscillations generate the P1-N1 complex and are related to memory performance
Phase-locked alpha and theta oscillations generate the P1-N1 complex and are related to memory performance
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DOI：
10.1016/j.cogbrainres.2003.11.016
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发表时间：
2004-05-01
期刊：
影响因子：
--
通讯作者：
Sauseng, P
中科院分区：
文献类型：
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作者：
Klimesch, W;Schack, B;Sauseng, P
提出了一个振荡相位重置模型，并报告了数据，表明事件相关电位的早期成分是由于诱发振荡的叠加。我们对以下假设进行了检验并得到了证实：(1)与刺激前相比，在P1和N1的时间窗内，θ和α的锁相明显增加；(2)事件相关的θ和α功率的动态变化遵循与事件相关的去同步研究相同的原则；(3)P1-N1复核的潜伏期测量与个体α频率呈负相关。此外，我们发现编码过程中的theta锁相比识别过程中更大，并且在N1的时间窗口中，记忆力好的人在识别过程中表现出更大的theta和alpha锁相增加。我们的总体结论是，P1-N1复合体主要由诱发的α和θ振荡产生，反映了工作记忆和语义记忆系统的同步激活。(C) 2004 Elsevier B.V.版权所有
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. (C) 2004 Elsevier B.V. All rights reserved.