OSCR

Sparse-to-dense coding transformation between hippocampal areas CA3 and CA1.

Overview

Authors: Shir R. Maimon1, Tamir Eliav1,2, Johnatan Aljadeff3, Aviya Shalev1, Yishai Gronich1, Nikita M. Finger4, Keegan E. Eveland4, Cynthia F. Moss4, Liora Las1, Nachum Ulanovsky1
  1. Department of Brain Sciences, Weizmann Institute of Science,Rehovot, Israel
  2. Present Address: Max Planck Institute for Biological Intelligence,Seewiesen, Germany
  3. Department of Neurobiology, University of California San Diego,La Jolla, CA USA
  4. Department of Psychological and Brain Sciences, Johns Hopkins University,Baltimore, MD USA
Journal: Nature, volume 655, issue 8125, pages 1242-1251
Dates: received 22 July 2025; accepted 13 April 2026; published online 27 May 2026; in print 2026
Type: Research article · Language: English
License: CC BY-NC-ND
Identifiers: DOI 10.1038/s41586-026-10537-0 · PMID 42203876 · PMCID PMC13421320 · OpenAlex W7162561666
Open access: hybrid, a free copy (OpenAlex)
Status: code verified
Categories: systems (subfield)
Methods: Spectral & time-frequency, Connectivity, Statistics, Machine learning, Single-unit activity, calcium imaging
Keywords: Hippocampus, Spatial memory
MeSH: CA1 Region, Hippocampal*, CA3 Region, Hippocampal*, Animals, Chiroptera, Flight, Animal, Male, Models, Neurological, Neurons, Place Cells, Spatial Memory (* major topic)
Topic: Memory and Neural Mechanisms (Cognitive Neuroscience, Neuroscience), according to OpenAlex
Funding: NINDS NIH HHS (R01 NS121413)
Citations: cited by 4 papers (Europe PMC); 90 references in the paper

Abstract

The abstract is not reproduced here: the paper's license (CC BY-NC-ND) does not allow it. Read it in the paper, at the publisher or on Europe PMC.

Code

No file of the authors' code could be read here: it is described below, and read at its source.

Zenodo 19244015

License: CC-BY-4.0
State: the link answers, verified on 28 September 2026
Evidence: files inventoried
Size: 1 file
Software Heritage: not checked
Found in: “Code availability”
Not found: README, license file, CITATION.cff, environment file, tests, continuous integration, documentation
Availability: 1 check, the latest on 28 September 2026: the link answers (HTTP 200)
  • 28 September 2026: the link answers (HTTP 200)
At the source:

Code availability statement

The paper has a code availability statement. Its license (CC BY-NC-ND) does not allow reproducing it here; in short, from what the harvester recognized in it:

  • it points to the authors' code: Zenodo 19244015

Read it in the paper: doi.org/10.1038/s41586-026-10537-0.

Tracing map

Proposed by the machine: these links were found in the paper and verified at the source, without human review. The map will receive a Zenodo DOI once one of the paper's authors has validated it with their ORCID.

What the map holds:

  • 1 repository of the authors' code, each at its verified commit, with its license and how the link was found in the paper;
  • 0 scripts, each with its path and the digest of its content;
  • no match between paragraphs and code yet;
  • neither the text of the paper nor the code itself.

Its JSON (tracing-map.json) is deposited on Zenodo with its DOI once the map is validated.

Data

No dataset and no data link were found in the paper.

Data availability statement

The paper has a data availability statement. Its license (CC BY-NC-ND) does not allow reproducing it here; in short, from what the harvester recognized in it:

  • no repository, dataset or request procedure was recognized in it

Read it in the paper: doi.org/10.1038/s41586-026-10537-0.

Versions

The history of this record: each version stored by the harvester or made by a correction of its authors or of the maintainers of its code, and what changed in its facts. The texts of the paper (its abstract, its availability statements) are not part of it; versions that changed only those are not listed.

Version 2, 28 September 2026

  • Publisher: n/a → Nature Portfolio

Version 1, 28 September 2026: the first record

Recorded: type, language, journal, volume, issue, pages, dates, 10 authors, 2 keywords, 10 MeSH terms, 1 funder, 84 references.

Cite

This paper

Maimon, S. R., Eliav, T., Aljadeff, J., Shalev, A., Gronich, Y., Finger, N. M., Eveland, K. E., Moss, C. F., Las, L., & Ulanovsky, N. (2026). Sparse-to-dense coding transformation between hippocampal areas CA3 and CA1. Nature, 655(8125), 1242-1251. https://doi.org/10.1038/s41586-026-10537-0

BibTeX

@article{maimon2026sparse,
author = {Maimon, Shir R. and Eliav, Tamir and Aljadeff, Johnatan and Shalev, Aviya and Gronich, Yishai and Finger, Nikita M. and Eveland, Keegan E. and Moss, Cynthia F. and Las, Liora and Ulanovsky, Nachum},
title = {{Sparse-to-dense coding transformation between hippocampal areas CA3 and CA1}},
journal = {Nature},
year = {2026},
month = may,
volume = {655},
number = {8125},
pages = {1242--1251},
publisher = {Nature Portfolio},
issn = {0028-0836},
doi = {10.1038/s41586-026-10537-0},
url = {https://doi.org/10.1038/s41586-026-10537-0},
pmid = {42203876},
pmcid = {PMC13421320}
}

RIS

TY - JOUR
AU - Maimon, Shir R.
AU - Eliav, Tamir
AU - Aljadeff, Johnatan
AU - Shalev, Aviya
AU - Gronich, Yishai
AU - Finger, Nikita M.
AU - Eveland, Keegan E.
AU - Moss, Cynthia F.
AU - Las, Liora
AU - Ulanovsky, Nachum
TI - Sparse-to-dense coding transformation between hippocampal areas CA3 and CA1
T2 - Nature
J2 - Nature
PY - 2026
DA - 2026/05/27
VL - 655
IS - 8125
SP - 1242
EP - 1251
SN - 0028-0836
PB - Nature Portfolio
DO - 10.1038/s41586-026-10537-0
UR - https://doi.org/10.1038/s41586-026-10537-0
LA - en
ER -

CSL-JSON

{
"id": "10.1038/s41586-026-10537-0",
"type": "article-journal",
"title": "Sparse-to-dense coding transformation between hippocampal areas CA3 and CA1",
"container-title": "Nature",
"author": [
{
"family": "Maimon",
"given": "Shir R."
},
{
"family": "Eliav",
"given": "Tamir"
},
{
"family": "Aljadeff",
"given": "Johnatan"
},
{
"family": "Shalev",
"given": "Aviya"
},
{
"family": "Gronich",
"given": "Yishai"
},
{
"family": "Finger",
"given": "Nikita M."
},
{
"family": "Eveland",
"given": "Keegan E."
},
{
"family": "Moss",
"given": "Cynthia F."
},
{
"family": "Las",
"given": "Liora"
},
{
"family": "Ulanovsky",
"given": "Nachum"
}
],
"container-title-short": "Nature",
"volume": "655",
"issue": "8125",
"page": "1242-1251",
"DOI": "10.1038/s41586-026-10537-0",
"PMID": "42203876",
"PMCID": "PMC13421320",
"ISSN": "0028-0836",
"publisher": "Nature Portfolio",
"URL": "https://doi.org/10.1038/s41586-026-10537-0",
"language": "en",
"issued": {
"date-parts": [
[
2026,
5,
27
]
]
}
}

The tracing map gets a citation of its own once an author has validated it and it has a DOI.

Similar papers

The papers with a page that share the most with this one: the tools found in their code, their categories, datasets, cited references and authors, the rarest counting most.

[1] doi:10.1038/s41467-026-77240-6
Prefrontal-thalamic goal states organize spatially aligned hippocampal maps.
Journal: Nature communications
In common: systems, 13 references
[2] doi:10.1038/s41467-026-74834-y [code]
Voltage imaging of CA1 pyramidal cells and SST+ interneurons reveals stability and plasticity mechanisms of spatial firing.
Journal: Nature communications
In common: systems, 9 references
[3] doi:10.1016/j.celrep.2026.117794 [code]
Subicular plateaus signal reward locations during goal-directed behavior.
Journal: Cell reports
In common: 8 references
[4] doi:10.1038/s41467-026-75492-w [code]
Place and behavioral modulation of hippocampal neurons during immobility.
Journal: Nature communications
In common: systems, 8 references
[5] doi:10.1371/journal.pcbi.1013488 [code]
Evaluating place cell detection methods in Rats and Humans: Implications for cross-species spatial coding.
Journal: PLoS computational biology
In common: 8 references
[6] doi:10.1126/sciadv.adz9893 [code]
Hippocampal place cells map terrain geometry independently of behavior.
Journal: Science advances
In common: 7 references
[7] doi:10.1002/hipo.70131 [code]
Decoding Medial Entorhinal Cortical Dynamics Produces Planning-Like Alternations in Hippocampal theta Sequences.
Journal: Hippocampus
In common: systems, 7 references
[8] doi:10.1111/nyas.70250 [code]
Structure, Dynamics, and Neural Codes in a Bat Social Network.
Journal: Annals of the New York Academy of Sciences
In common: systems, 3 references, author Nachum Ulanovsky
[9] doi:10.1371/journal.pcbi.1014575 [code]
Remembering the "when": Hebbian memory models for the time of past events.
Journal: PLoS computational biology
In common: 7 references
[10] doi:10.1038/s41467-026-71503-y [code]
Rapid formation of non-spatial hippocampal representations consistent with behavioral timescale synaptic plasticity is modulated by entorhinal input.
Journal: Nature communications
In common: 6 references

Contribute

The authors of this paper can claim it, correct its record and validate its tracing map, and the maintainers of its code (its owner, or a public member of its organization) correct what it says of their repository; anyone signed in can ask for its removal. Every request goes to OSCR's own machine, which answers it; your account page follows them.

Sign in with ORCID to claim this paper as one of its authors, correct its record or validate its tracing map: when the paper's metadata lists your ORCID iD, you are recognized at once. Maintainers of its code: sign in with GitHub, then claim the repository on your account page.

Request its removal

To ask OSCR to remove this record, the copies of its authors' scripts or its tracing map, use the removal request page: signed in, you say who you are, what to remove and why, then review and confirm the request. Published rules decide every request (how).

Discussion, reproductions, activity

Discussion: questions and error reports about this paper and its code, from signed-in readers and its authors. It opens with sign-in.

Reproductions: reports from readers who ran the authors' code: what they reproduced, with which environment, commit and data. It opens with sign-in.

Activity: what happens around this paper: new versions of its record, its map's validation, discussions and reproductions. It opens with sign-in.