Evidence map›Paper›PMID 28170164›Full record

ArticleDevelopmental neurobiology2017

Perineuronal nets and vocal plasticity in songbirds: A proposed mechanism to explain the difference between closed-ended and open-ended learning.

Gilles Cornez, Farrah N Madison, Annemie Van der Linden, Charlotte Cornil, Kathleen M Yoder, Gregory F Ball, Jacques Balthazart

Abstract readComparative Study
In one paragraph

Article in Developmental neurobiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing 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.

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

21 citing papers in PubMed.

  1. Critical Periods and Beyond: Dynamic Functions of Perineuronal Nets in Cognition, Development, and Disease.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Review
  2. Article
  3. Frontiers in neural circuits · 2025
    Article
  4. Review
  5. Article
  6. A brain for all seasons: An in vivo MRI perspective on songbirds.Journal of experimental zoology. Part A, Ecological and integrative physiology · 2022
    Review
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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

7 authors.

Gilles CornezGIGA Neuroscience, University of Liege, Liege, 4000, Belgium.
Farrah N MadisonDepartment of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, Maryland, 21218.
Annemie Van der LindenBio-imaging Lab, University of Antwerp, Antwerpen, Belgium.
Charlotte CornilGIGA Neuroscience, University of Liege, Liege, 4000, Belgium.
Kathleen M YoderDepartment of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, Maryland, 21218.
Gregory F BallDepartment of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, Maryland, 21218.
Jacques BalthazartGIGA Neuroscience, University of Liege, Liege, 4000, Belgium.ORCID 0000-0001-9492-2126

Funding

SEASONAL PLASTICITY IN STEROID SENSITIVE NEURAL CIRCUITSR01NS035467 · NINDS · JOHNS HOPKINS UNIVERSITY · PI BALL, GREGORY F · 1997 to 2011
$2.7M
NINDS NIH HHS R01 NS035467
6 · The paper itself

Abstract

Perineuronal nets (PNN) are aggregations of chondroitin sulfate proteoglycans surrounding the soma and proximal processes of neurons, mostly GABAergic interneurons expressing parvalbumin. They limit the plasticity of their afferent synaptic connections. In zebra finches PNN develop in an experience-dependent manner in the song control nuclei HVC and RA (nucleus robustus arcopallialis) when young birds crystallize their song. Because songbird species that are open-ended learners tend to recapitulate each year the different phases of song learning until their song crystallizes at the beginning of the breeding season, we tested whether seasonal changes in PNN expression would be found in the song control nuclei of a seasonally breeding species such as the European starling. Only minimal changes in PNN densities and total number of cells surrounded by PNN were detected. However, comparison of the density of PNN and of PNN surrounding parvalbumin-positive cells revealed that these structures are far less numerous in starlings that show extensive adult vocal plasticity, including learning of new songs throughout the year, than in the closed-ended learner zebra finches. Canaries that also display some vocal plasticity across season but were never formally shown to learn new songs in adulthood were intermediate in this respect. Together these data suggest that establishment of PNN around parvalbumin-positive neurons in song control nuclei has diverged during evolution to control the different learning capacities observed in songbird species. This differential expression of PNN in different songbird species could represent a key cellular mechanism mediating species variation between closed-ended and open-ended learning strategies. © 2017 Wiley Periodicals, Inc. Develop Neurobiol 77: 975-994, 2017.

Indexed as

AnimalsAvian ProteinsBrainCanariesCell Nucleus SizeChondroitin Sulfate ProteoglycansCritical Period, PsychologicalFinchesLearningMaleNeuronal PlasticityNeuronsParvalbuminsPhotoperiodRandom AllocationSeasonsAvian ProteinsChondroitin Sulfate ProteoglycansParvalbuminsTestosteronecanaryEuropean starlingparvalbuminperineuronal netssong control nucleisong plasticityzebra finch

Identifiers

PMID28170164
PMCPMC5513760

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Registered trials

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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.