Evidence map›Paper›PMID 26384513›Full record

ArticleJournal of neurology, neurosurgery, and psychiatry2016

Meyer's loop asymmetry and language lateralisation in epilepsy.

Mark Nowell, Sjoerd B Vos, Meneka Sidhu, Kaitlin Wilcoxen, Narek Sargsyan, Sebastien Ourselin, John S Duncan

Abstract read
In one paragraph

Article in Journal of neurology, neurosurgery, and psychiatry, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

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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

12 citing papers in PubMed.

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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.

Mark NowellDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, UK MRI Unit, Epilepsy Society, Chalfont St Peter, UK.
Sjoerd B VosMRI Unit, Epilepsy Society, Chalfont St Peter, UK Translational Imaging Group, Centre of Medical Imaging and Computing, UCL, London, UK.
Meneka SidhuMRI Unit, Epilepsy Society, Chalfont St Peter, UK.
Kaitlin WilcoxenMRI Unit, Epilepsy Society, Chalfont St Peter, UK.
Narek SargsyanMRI Unit, Epilepsy Society, Chalfont St Peter, UK.
Sebastien OurselinTranslational Imaging Group, Centre of Medical Imaging and Computing, UCL, London, UK.
John S DuncanDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, UK MRI Unit, Epilepsy Society, Chalfont St Peter, UK.

Funding

Department of Health HICF-T4-275Wellcome TrustWellcome Trust 97914
6 · The paper itself

Abstract

objectivesSeveral studies have suggested an asymmetry in Meyer's loop in individuals, with the left loop anterior to the right. In this study we test the hypothesis that there is an association between Meyer's loop asymmetry (MLA) and language lateralisation.

methods57 patients with epilepsy were identified with language functional MRI (fMRI) and diffusion MRI acquisition. Language lateralisation indices from fMRI(LI) and optic radiation and arcuate fasciculus probabilistic tractography was performed for each subject. The subjects were divided into left language dominant (LI>0.4) and non-left language groups (LI<0.4) according to their LI.

resultsA negative linear correlation was identified between language lateralisation and MLA, with greater left lateralised language associated with more anteriorly placed left Meyer's loops (R value -0.34, p=0.01). There was a significant difference in mean MLA between the two groups, with the left loop being anterior to the right loop in the LI>0.4 group and posterior to the right loop in the LI<0.4 group (p=0.003). No correlation was found between language lateralisation and arcuate fasciculus volume.

conclusionsThis study suggests an association between the extent of Meyer's loop asymmetry and the lateralisation of language determined by fMRI in patients with epilepsy. Further studies should be carried out to evaluate this association in control subjects and with other measures of language lateralisation.

Indexed as

LanguageAdultEpilepsy, Temporal LobeFemaleFunctional LateralityFunctional NeuroimagingGeniculate BodiesHumansMagnetic Resonance ImagingMaleMiddle AgedNeural PathwaysVisual CortexYoung Adult

Identifiers

PMID26384513
PMCPMC4975828

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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.