Theta and alpha oscillations during working-memory maintenance predict successful long-term memory encoding

NEUROSCIENCE LETTERS

卷:468

Article

Khader, Patrick H.¹  Jost, Kerstin²  Ranganath, Charan^3,4 

[1] Univ Marburg, Dept Psychol, D-35032 Marburg, Germany

[2] Rhein Westfal TH Aachen, Inst Psychol, Aachen, Germany

[3] Univ Calif Davis, Dept Psychol, Davis, CA 95616 USA

[4] Univ Calif Davis, Ctr Neurosci, Davis, CA 95616 USA

关键词: EEG;    Oscillations;    Alpha;    Theta;    Dm effect;   

DOI  :  10.1016/j.neulet.2009.11.028

来源: Elsevier

【 摘 要 】

To date, much is known about the neural mechanisms underlying working-memory (WM) maintenance and long-term-memory (LTM) encoding. However, these topics have typically been examined in isolation, and little is known about how these processes might interact. Here, we investigated whether EEG oscillations arising specifically during the delay of a delayed matching-to-sample task reflect successful LTM encoding. Given previous findings of increased alpha and theta power with increasing WM load, together with the assumption that successful memory encoding involves processes that are similar to those that are invoked by increasing WM load, alpha and theta power should be higher for subsequently remembered stimuli. Consistent with this assumption, we found stronger alpha power for subsequently remembered stimuli over occipital-to-parietal scalp sites. Furthermore, stronger theta power was found for subsequently remembered stimuli over parietal-to-central electrodes. These results support the idea that alpha and theta oscillations modulate successful LTM encoding. (C) 2009 Elsevier Ireland Ltd. All rights reserved.

【 授权许可】

Free