Evidence map›Paper›PMID 26605509›Full record

ArticleAnnals of neurology2016

Activation of specific neuronal networks leads to different seizure onset types.

Zahra Shiri, Frédéric Manseau, Maxime Lévesque, Sylvain Williams, Massimo Avoli

Abstract read
In one paragraph

Article in Annals of neurology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing 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

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

  1. GABAFrontiers in neural circuits · 2022
    Pooled it
  2. Article
  3. Article
  4. Epileptogenicity alters intrahippocampal ripple propagation.medRxiv : the preprint server for health sciences · 2026
    Article
  5. Aperiodic Activity Reflects Pathologic Waveform Shapes in Focal Epilepsy.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  6. Article
  7. Review
  8. Modulation ofCurrent neuropharmacology · 2025
    Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Networks through the lens of high-frequency oscillations.Frontiers in network physiology · 2024
    Review
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Involvement of GABAergic Interneuron Subtypes in 4-Aminopyridine-Induced Seizure-Like Events in Mouse Entorhinal CortexThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2023
    Article
  20. 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

5 authors.

Zahra ShiriMontreal Neurological Institute, Department of Neurology and Neurosurgery, and Department of Physiology, McGill University, Montreal, Quebec, Canada.
Frédéric ManseauDouglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada.
Maxime LévesqueMontreal Neurological Institute, Department of Neurology and Neurosurgery, and Department of Physiology, McGill University, Montreal, Quebec, Canada.
Sylvain WilliamsDouglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada.
Massimo AvoliMontreal Neurological Institute, Department of Neurology and Neurosurgery, and Department of Physiology, McGill University, Montreal, Quebec, Canada.

Funding

CIHR 74609CIHR 74609-2CIHR 8109CIHR 8109-6CIHR MOP119340
6 · The paper itself

Abstract

objectiveIctal events occurring in temporal lobe epilepsy patients and in experimental models mimicking this neurological disorder can be classified, based on their onset pattern, into low-voltage, fast versus hypersynchronous onset seizures. It has been suggested that the low-voltage, fast onset pattern is mainly contributed by interneuronal (γ-aminobutyric acidergic) signaling, whereas the hypersynchronous onset involves the activation of principal (glutamatergic) cells.

methodsHere, we tested this hypothesis using the optogenetic control of parvalbumin-positive or somatostatin-positive interneurons and of calmodulin-dependent, protein kinase-positive, principal cells in the mouse entorhinal cortex in the in vitro 4-aminopyridine model of epileptiform synchronization.

resultsWe found that during 4-aminopyridine application, both spontaneous seizure-like events and those induced by optogenetic activation of interneurons displayed low-voltage, fast onset patterns that were associated with a higher occurrence of ripples than of fast ripples. In contrast, seizures induced by the optogenetic activation of principal cells had a hypersynchronous onset pattern with fast ripple rates that were higher than those of ripples.

interpretationOur results firmly establish that under a similar experimental condition (ie, bath application of 4-aminopyridine), the initiation of low-voltage, fast and of hypersynchronous onset seizures in the entorhinal cortex depends on the preponderant involvement of interneuronal and principal cell networks, respectively.

Indexed as

Cortical SynchronizationInterneurons4-AminopyridineAnimalsEntorhinal CortexMiceNerve NetOptogeneticsSeizures4-Aminopyridine

Identifiers

PMID26605509
PMCPMC4878884

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.