Cited by 203Memory and Neural MechanismsMemory Processes and InfluencesNeural dynamics and brain function

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Medial Temporal Theta/Alpha Power Enhancement Precedes Successful Memory Encoding: Evidence Based on Intracranial EEG

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Abstract

Not only poststimulus, but also prestimulus neural activity has been shown to be predictive for later successful memory encoding. However, it is still not clear which medial temporal lobe processes precede effective memory formation. Here, our aim was to investigate whether such prestimulus markers for successful memory encoding can be specified based on intracranial recordings directly from the hippocampus and rhinal cortex. For this purpose, we analyzed subsequent memory effects during a continuous word recognition paradigm in 31 presurgical epilepsy patients. We found that rhinal and hippocampal theta and successive alpha power enhancement before word presentation predicted successful memory encoding. Previous studies suggest that stimulus-triggered hippocampal theta activity is particularly related to memory retrieval and activation of a mnemonic context, whereas the alpha rhythm reflects inhibitory top-down control of task processing and executive functioning. In line with these suggestions, we propose that the observed medial temporal theta and alpha power increases before stimulus presentation reflect activation of contextual information and inhibitory top-down control processes preparing for stimulus-triggered memory processing.

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Crossref · 10.1523/jneurosci.3668-10.2011

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Metadata

Authors
Fell, J., Ludowig, E., Staresina, B. P., Wagner, T., Kranz, T., Elger, C. E., & Axmacher, N.
Affiliations
University of Bonn (DE)
Venue
The Journal of Neuroscience
Published
2011-04-06
Volume
31
Issue
14
Pages
5392-5397
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2025180344
Cited by
203
References
44
Citations by year
2026: 5 · 2025: 11 · 2024: 9 · 2023: 13 · 2022: 18 · 2021: 19 · 2020: 16 · 2019: 9 · 2018: 17 · 2017: 13 · 2016: 14 · 2015: 11 · 2014: 17 · 2013: 18 · 2012: 9
FWCI
7.64
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • Volkswagen Foundation (I/79878)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
memory encoding, medial temporal lobe, hippocampus, rhinal cortex, theta power, alpha power, subsequent memory effect, word recognition, top-down control, contextual information, epilepsy patients, intracranial EEG
MeSH terms
Adolescent, Adult, Alpha Rhythm, Brain Mapping, Child, Child, Preschool, Electroencephalography, Epilepsy, Temporal Lobe, Female, Hippocampus, Humans, Male, Middle Aged, Neuropsychological Tests, Photic Stimulation, Reaction Time, Temporal Lobe, Theta Rhythm, Vocabulary, Statistics, Nonparametric, Recognition, Psychology, Young Adult

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