Evidence map›Paper›PMID 34290240›Full record

ArticleNature communications2021

Distinct cortical systems reinstate the content and context of episodic memories.

James E Kragel, Youssef Ezzyat, Bradley C Lega, Michael R Sperling, Gregory A Worrell, Robert E Gross, Barbara C Jobst, Sameer A Sheth, Kareem A Zaghloul, Joel M Stein and 1 more

Registry-linked trialAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04286776 (Memory Retrieval and Encoding Investigated by Neural Stimulation), which is not on this map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–field-weighted citation impact
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.

NCT04286776 naactive not recruitingnot on this map

Memory Retrieval and Encoding Investigated by Neural Stimulation

TypeinterventionalSponsorUniversity of PennsylvaniaRan2014 to 2024Enrolled800ConditionsEpilepsy IntractableArmsDirect electrical stimulation
3 · Its place in the literature

Who cites it

14 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Memory consolidation accelerates.Nature neuroscience · 2025
    Article
  7. Article
  8. Article
  9. Semantic associations restore neural encoding mechanisms.Learning & memory (Cold Spring Harbor, N.Y.) · 2024
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Cue overlap supports preretrieval selection in episodic memory: ERP evidence.Cognitive, affective & behavioral neuroscience · 2022
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

James E KragelDepartment of Psychology, University of Pennsylvania, Philadelphia, PA, USA. james.kragel@northwestern.edu.ORCID http://orcid.org/0000-0002-3240-6203
Youssef EzzyatDepartment of Psychology, University of Pennsylvania, Philadelphia, PA, USA.
Bradley C LegaDepartment of Neurosurgery, University of Texas Southwestern, Dallas, TX, USA.ORCID http://orcid.org/0000-0003-3634-406X
Michael R SperlingDepartment of Neurology, Thomas Jefferson University, Philadelphia, PA, USA.ORCID http://orcid.org/0000-0003-0708-6006
Gregory A WorrellDepartment of Neurology, Mayo Clinic, Rochester, MN, USA.ORCID http://orcid.org/0000-0003-2916-0553
Robert E GrossDepartment of Neurosurgery, Emory School of Medicine, Atlanta, GA, USA.
Barbara C JobstDepartment of Neurology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA.
Sameer A ShethDepartment of Neurosurgery, Columbia University Medical Center, New York, NY, USA.
Kareem A ZaghloulSurgical Neurology Branch, National Institutes of Health, Bethesda, MD, USA.ORCID http://orcid.org/0000-0001-8575-3578
Joel M SteinDepartment of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA, USA.
Michael J KahanaDepartment of Psychology, University of Pennsylvania, Philadelphia, PA, USA. kahana@psych.upenn.edu.

Funding

Investigating the neural mechanisms of human cognitive function through intracranial recordingsZIANS003144 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI ZAGHLOUL, KAREEM · 2014 to 2025
$36.1M
Mapping the Human Connectome: Structure, Function, and HeritabilityU54MH091657 · NIMH · WASHINGTON UNIVERSITY · PI UGURBIL, KAMIL, VAN ESSEN, DAVID C · 2010 to 2014
$34.7M
Associative Processes in Episodic MemoryR01MH055687 · NIMH · UNIVERSITY OF PENNSYLVANIA · PI KAHANA, MICHAEL JACOB · 2002 to 2024
$7.9M
TRAINING PROGRAM IN THE NEUROSCIENCE OF HUMAN COGNITIONT32NS047987 · NINDS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI Rodrigo M Braga, Christina Maria Zelano · 2006 to 2026
$5.6M
Targeted closed-loop intracranial brain-stimulation to improve episodic memoryR01NS106611 · NINDS · UNIVERSITY OF PENNSYLVANIA · PI KAHANA, MICHAEL JACOB · 2019 to 2023
$3.1M
Associative Processes in Episodic MemoryRF1MH055687 · NIMH · UNIVERSITY OF PENNSYLVANIA · PI KAHANA, MICHAEL JACOB · 2025 to 2025
$1.1M
MATHEMATICAL MODELS OF HUMAN MEMORYR29MH055687 · NIMH · BRANDEIS UNIVERSITY · PI KAHANA, MICHAEL JACOB · 1997 to 2001
$218k
NIMH NIH HHS R01 MH055687NIMH NIH HHS R29 MH055687NIMH NIH HHS RF1 MH055687NIMH NIH HHS U54 MH091657NINDS NIH HHS R01 NS106611NINDS NIH HHS T32 NS047987
6 · The paper itself

Abstract

Episodic recall depends upon the reinstatement of cortical activity present during the formation of a memory. Evidence from functional neuroimaging and invasive recordings in humans suggest that reinstatement organizes our memories by time or content, yet the neural systems involved in reinstating these unique types of information remain unclear. Here, combining computational modeling and intracranial recordings from 69 epilepsy patients, we show that two cortical systems uniquely reinstate the semantic content and temporal context of previously studied items during free recall. Examining either the posterior medial or anterior temporal networks, we find that forward encoding models trained on the brain's response to the temporal and semantic attributes of items can predict the serial position and semantic category of unseen items. During memory recall, these models uniquely link reinstatement of temporal context and semantic content to these posterior and anterior networks, respectively. These findings demonstrate how specialized cortical systems enable the human brain to target specific memories.

Indexed as

Memory, EpisodicBrain MappingCerebral CortexEpilepsyHumansMagnetic Resonance ImagingMental RecallModels, NeurologicalNerve NetSemantics

Identifiers

PMID34290240
PMCPMC8295370

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Registered trials

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.