Evidence map›Paper›PMID 26109670›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2015

Slow Spatial Recruitment of Neocortex during Secondarily Generalized Seizures and Its Relation to Surgical Outcome.

Louis-Emmanuel Martinet, Omar J Ahmed, Kyle Q Lepage, Sydney S Cash, Mark A Kramer

Abstract read
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing 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

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

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  18. Seizure pathways change on circadian and slower timescales in individual patients with focal epilepsy.Proceedings of the National Academy of Sciences of the United States of America · 2020
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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

5 authors.

Louis-Emmanuel MartinetDepartment of Mathematics and Statistics, Boston University, Boston, Massachusetts 02215 and.ORCID http://orcid.org/0000-0003-2222-4120
Omar J AhmedDepartment of Neurology, Massachusetts General Hospital, Boston, Massachusetts 02114.
Kyle Q LepageDepartment of Mathematics and Statistics, Boston University, Boston, Massachusetts 02215 and.
Sydney S CashDepartment of Neurology, Massachusetts General Hospital, Boston, Massachusetts 02114.
Mark A KramerDepartment of Mathematics and Statistics, Boston University, Boston, Massachusetts 02215 and mak@bu.edu.

Funding

Neurophysiology of Human Cortical EpilepsyR01NS062092 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI CASH, SYDNEY S · 2010 to 2021
$4.7M
Multiscale analysis and modeling of spatiotemporal dynamics in human epilepsyR01NS072023 · NINDS · BOSTON UNIVERSITY (CHARLES RIVER CAMPUS) · PI EDEN, URI TZVI, KRAMER, MARK ALAN · 2011 to 2015
$1.8M
Neurophysiology of Human Cortical EpilepsyR56NS062092 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI CASH, SYDNEY S · 2017 to 2017
$608k
NINDS NIH HHS R01 NS062092NINDS NIH HHS R01 NS072023NINDS NIH HHS R01NS072023NINDS NIH HHS R56 NS062092
6 · The paper itself

Abstract

Understanding the spatiotemporal dynamics of brain activity is crucial for inferring the underlying synaptic and nonsynaptic mechanisms of brain dysfunction. Focal seizures with secondary generalization are traditionally considered to begin in a limited spatial region and spread to connected areas, which can include both pathological and normal brain tissue. The mechanisms underlying this spread are important to our understanding of seizures and to improve therapies for surgical intervention. Here we study the properties of seizure recruitment-how electrical brain activity transitions to large voltage fluctuations characteristic of spike-and-wave seizures. We do so using invasive subdural electrode arrays from a population of 16 patients with pharmacoresistant epilepsy. We find an average delay of ∼30 s for a broad area of cortex (8 × 8 cm) to be recruited into the seizure, at an estimated speed of ∼4 mm/s. The spatiotemporal characteristics of recruitment reveal two categories of patients: one in which seizure recruitment of neighboring cortical regions follows a spatially organized pattern consistent from seizure to seizure, and a second group without consistent spatial organization of activity during recruitment. The consistent, organized recruitment correlates with a more regular, compared with small-world, connectivity pattern in simulation and successful surgical treatment of epilepsy. We propose that an improved understanding of how the seizure recruits brain regions into large amplitude voltage fluctuations provides novel information to improve surgical treatment of epilepsy and highlights the slow spread of massive local activity across a vast extent of cortex during seizure.

Indexed as

Brain MappingAdultElectroencephalographyEpilepsyFemaleHumansMaleMiddle AgedNeocortexNeurosurgical ProceduresSeizuresTreatment OutcomeYoung Adultepilepsyfocal seizureintracranial EEGseizure propagationseizure spread

Identifiers

PMID26109670
PMCPMC4478258

What OpenQuestion holds

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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.