Evidence map›Paper›PMID 33158958›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2020

Hippocampal Theta Oscillations Support Successful Associative Memory Formation.

Srinivas Kota, Michael D Rugg, Bradley C Lega

Erratum issuedOpen access · bronzeAbstract read
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 54 papers.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed
6.5field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

54 citing papers in PubMed, 93 citations in OpenAlex.

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  12. Precise temporal dynamics of ripple events support order memory in human hippocampal-cortical circuits.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  13. Prediction Error-Related Memory Enhancement Depends on the Neural State Surrounding the Prediction Error Event.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 3 institutions in 1 country.

Srinivas KotaDepartment of Neurosurgery, University of Texas Southwestern Medical Center, Dallas, Texas 75390.ORCID 0000-0001-7870-4903
Michael D RuggCenter for Vital Longevity, University of Texas at Dallas, Dallas, Texas 75390.ORCID 0000-0002-0397-5749
Bradley C LegaDepartment of Neurosurgery, University of Texas Southwestern Medical Center, Dallas, Texas 75390 Bradley.Lega@UTSouthwestern.edu.
Southwestern Medical Center · USThe University of Texas at Dallas · USThe University of Texas Southwestern Medical Center · US

Funding

Using deep brain stimulation of the parietal cortex to investigate the electrophysiology of human episodic memoryR01NS107357 · NINDS · UT SOUTHWESTERN MEDICAL CENTER · PI Bradley C Lega · 2018 to 2026
$3.6M
NINDS NIH HHS R01 NS107357
6 · The paper itself

Abstract

Models of memory formation posit that episodic memory formation depends critically on the hippocampus, which binds features of an event to its context. For this reason, the contrast between study items that are later recollected with their associative pair versus those for which no association is made fails should reveal electrophysiological patterns in the hippocampus selectively involved in associative memory encoding. Extensive data from studies in rodents support a model in which theta oscillations fulfill this role, but results in humans have not been as clear. Here, we used an associative recognition memory procedure to identify hippocampal correlates of successful associative memory encoding and retrieval in patients (10 females and 9 males) undergoing intracranial EEG monitoring. We identified a dissociation between 2-5 Hz and 5-9 Hz theta oscillations, by which power increases in 2-5 Hz oscillations were uniquely linked with successful associative memory in both the anterior and posterior hippocampus. These oscillations exhibited a significant phase reset that also predicted successful associative encoding and distinguished recollected from nonrecollected items at retrieval, as well as contributing to relatively greater reinstatement of encoding-related patterns for recollected versus nonrecollected items. Our results provide direct electrophysiological evidence that 2-5 Hz hippocampal theta oscillations preferentially support the formation of associative memories, although we also observed memory-related effects in the 5-9 Hz frequency range using measures such as phase reset and reinstatement of oscillatory activity.

Indexed as

AdultAssociation LearningElectrocorticographyFemaleHippocampusHumansMaleMemory ConsolidationMemory, EpisodicMental RecallMiddle AgedRecognition, PsychologyTheta RhythmYoung Adultassociative recognitionepisodic memoryhippocampusintracranial electroencephalography

Identifiers

PMID33158958
PMCPMC7724134
OpenAlexW3097451561

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.