Evidence map›Paper›PMID 34780864›Full record

ReviewProgress in neurobiology2022

The functional characterization of callosal connections.

Giorgio M Innocenti, Kerstin Schmidt, Chantal Milleret, Mara Fabri, Maria G Knyazeva, Alexandra Battaglia-Mayer, Francisco Aboitiz, Maurice Ptito, Matteo Caleo, Carlo A Marzi and 3 more

Abstract readReview
In one paragraph

Review in Progress in neurobiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 1 pooled it
–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

37 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. A causal role for the posterior corpus callosum in bimanual coordination.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  5. Article
  6. Article
  7. Mapping prefrontal afferents along development.Frontiers in neuroscience · 2026
    Article
  8. Article
  9. Article
  10. Article
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  14. Hallmarks of Brain Plasticity.Biomedicines · 2025
    Review
  15. Article
  16. Article
  17. Review
  18. Article
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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

13 authors.

Giorgio M InnocentiDepartment of Neuroscience, Karolinska Institutet, Stockholm, Sweden; Signal Processing Laboratory (LTS5), École Polytechnique Fédérale (EPFL), Lausanne, Switzerland.
Kerstin SchmidtBrain Institute, Federal University of Rio Grande do Norte (UFRN), Natal, Brazil.
Chantal MilleretCenter for Interdisciplinary Research in Biology, Collège de France, CNRS UMR 7241, INSERM U 1050, Label Memolife, PSL Research University, Paris, France.
Mara FabriDepartment of Life and Environmental Sciences, Marche Polytechnic University, Ancona, Italy.
Maria G KnyazevaLaboratoire de Recherche en Neuroimagerie (LREN), Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland; Leenaards Memory Centre and Department of Clinical Neurosciences, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland.
Alexandra Battaglia-MayerDepartment of Physiology and Pharmacology, University of Rome SAPIENZA, Rome, Italy.
Francisco AboitizCentro Interdisciplinario de Neurociencias and Departamento de Psiquiatría, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.
Maurice PtitoHarland Sanders Chair in Visual Science, École d'Optométrie, Université de Montréal, Montréal, Qc, Canada; Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, Qc, Canada; Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark.
Matteo CaleoDepartment of Biomedical Sciences, University of Padua, Italy; CNR Neuroscience Institute, Pisa, Italy.
Carlo A MarziDepartment of Neuroscience, Biomedicine and Movement, University of Verona, Verona, Italy.
Muhamed BarakovicSignal Processing Laboratory (LTS5), École Polytechnique Fédérale (EPFL), Lausanne, Switzerland.
Franco LeporeDepartment of Psychology, Centre de Recherche en Neuropsychologie et Cognition, University of Montréal, Montréal, QC, Canada.
Roberto CaminitiDepartment of Physiology and Pharmacology, University of Rome SAPIENZA, Rome, Italy; Neuroscience and Behavior Laboratory, Istituto Italiano di Tecnologia, Rome, Italy. Electronic address: roberto.caminiti@uniroma1.it.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The brain operates through the synaptic interaction of distant neurons within flexible, often heterogeneous, distributed systems. Histological studies have detailed the connections between distant neurons, but their functional characterization deserves further exploration. Studies performed on the corpus callosum in animals and humans are unique in that they capitalize on results obtained from several neuroscience disciplines. Such data inspire a new interpretation of the function of callosal connections and delineate a novel road map, thus paving the way toward a general theory of cortico-cortical connectivity. Here we suggest that callosal axons can drive their post-synaptic targets preferentially when coupled to other inputs endowing the cortical network with a high degree of conditionality. This might depend on several factors, such as their pattern of convergence-divergence, the excitatory and inhibitory operation mode, the range of conduction velocities, the variety of homotopic and heterotopic projections and, finally, the state-dependency of their firing. We propose that, in addition to direct stimulation of post-synaptic targets, callosal axons often play a conditional driving or modulatory role, which depends on task contingencies, as documented by several recent studies.

Indexed as

AxonsCorpus CallosumAnimalsBrainHumansNeural PathwaysNeuronsCallosal axon diameterCallosal conduction velocityCallosal connections flexibilityCallosal disconnection syndromesCallosal interhemispheric transferCorpus callosum

Identifiers

PMID34780864
PMCPMC8752969

What OpenQuestion holds

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LicenceCC BY-NC-ND
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.