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

Patrick H. Khader, Kerstin Jost, Charan Ranganath, Frank Rösler

Research output: Contribution to journalArticle

85 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)339-343
Number of pages5
JournalNeuroscience Letters
Volume468
Issue number3
DOIs
StatePublished - Jan 14 2010

Keywords

  • Alpha
  • Dm effect
  • EEG
  • Oscillations
  • Theta

ASJC Scopus subject areas

  • Neuroscience(all)

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