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

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

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Fell, Juergen, Ludowig, Eva, Staresina, Bernhard P., Wagner, Tobias, Kranz, Thorsten, Elger, Christian E., Axmacher, Nikolai·2011·The Journal of Neuroscience

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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  • Theta activity in waking is considered a condition favoring the encoding of new information and associated synaptic plastic processes in hippocampal networks.

    “Theta activity in waking is considered a condition favoring the encoding of new information and associated synaptic plastic processes in hippocampal networks (64,371,612,1251).”

    From About Sleep's Role in Memory (2013) · cites this paper as [371]

    The Discussion (page unavailable) reports that increased hippocampal theta power before word presentation predicted successful memory formation, supporting the encoding part of the claim. It does not link that activity to synaptic plasticity in hippocampal networks; a search for synaptic plasticity and long-term potentiation found no such passage. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • The amount of theta power present at the time individuals are asked to recall a stimulus is associated with the recall of that stimulus.

    “(1) the amount of theta power present at the time individuals are asked to recall a stimulus is associated with the recall of that stimulus (Fell et al., 2011; Guderian, Schott, Richardson-Klavehn, & Duzel, 2009; Lega, Jacobs, & Kahana, 2012; Watrous et al., 2013)”

    From Brain oscillations, hypnosis, and hypnotizability (2015) · cites this paper as Fell et al., 2011

    The Results associate prestimulus hippocampal theta power with whether words were later remembered. But the Materials and Methods specify that theta was measured around the words’ first presentation, not when participants were later asked to recognize them at the second presentation. The claim gets the association with later memory right but places the measurement at the wrong time. (LLM, conf=0.90)

    Experimental — accuracy not yet measured

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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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