Evidence map›Paper›PMID 27082649›Full record

ArticleEpilepsy research2016

Low functional robustness in mesial temporal lobe epilepsy.

C Garcia-Ramos, J Song, B P Hermann, V Prabhakaran

Abstract read
In one paragraph

Article in Epilepsy research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 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

4 authors.

C Garcia-RamosDepartment of Medical Physics, University of Wisconsin School of Medicine and Public Health, 1111 Highland Ave., Rm 1005, Madison, WI 53705-2275, United States. Electronic address: garciaramos@wisc.edu.
J SongBiomedical Engineering, University of Wisconsin, College of Engineering, 1415 Engineering Drive, Madison, WI 53706, United States. Electronic address: jie.z.song@gmail.com.
B P HermannDepartment of Neurology, University of Wisconsin School of Medicine and Public Health, Matthews Neuropsychology Lab, 7223 UW Medical Foundation Centennial Building, 1685 Highland Ave., Madison, WI 53705-2281, United States. Electronic address: hermann@neurology.wisc.edu.
V PrabhakaranDepartment of Medical Physics, University of Wisconsin School of Medicine and Public Health, 1111 Highland Ave., Rm 1005, Madison, WI 53705-2275, United States; Department of Neurology, University of Wisconsin School of Medicine and Public Health, Matthews Neuropsychology Lab, 7223 UW Medical Foundation Centennial Building, 1685 Highland Ave., Madison, WI 53705-2281, United States; Department of Radiology, University of Wisconsin School of Medicine and Public Health, E3/366 Clinical Science Center, 600 Highland Ave., Madison, WI 53792-3252, United States. Electronic address: vprabhakaran@uwhealth.org.

Funding

U.W. RADIOLOGICAL SCIENCES TRAINING PROGRAMT32CA009206 · NCI · UNIVERSITY OF WISCONSIN-MADISON · PI Bryan Patrick Bednarz · 1985 to 2026
$12.1M
Neuropsychological Progression of New Onset EpilepsyR01NS044351 · NINDS · UNIVERSITY OF WISCONSIN-MADISON · PI HERMANN, BRUCE PHILLIP · 2003 to 2015
$6.3M
Stroke PlasticityK23NS086852 · NINDS · UNIVERSITY OF WISCONSIN-MADISON · PI PRABHAKARAN, VIVEK · 2014 to 2017
$749k
Presurgical brain mapping with functional connectivity MRIR41NS081926 · NINDS · PRISM CLINICAL IMAGING INC. · PI DEYOE, EDGAR A · 2013 to 2013
$278k
NCI NIH HHS T32 CA009206NINDS NIH HHS K23 NS086852NINDS NIH HHS R01 NS044351NINDS NIH HHS R41 NS081926
6 · The paper itself

Abstract

objectivesBrain functional topology was investigated in patients with mesial temporal lobe epilepsy (mTLE) by means of graph theory measures in two differentially defined graphs. Measures of segregation, integration, and centrality were compared between subjects with mTLE and healthy controls (HC).

methodsEleven subjects with mTLE (age 36.5±10.9years) and 15 age-matched HC (age 36.8±14.0years) participated in this study. Both anatomically and functionally defined adjacency matrices were used to investigate the measures. Binary undirected graphs were constructed to study network segregation by calculating global clustering and modularity, and network integration by calculating local and global efficiency. Node degree and participation coefficient were also computed in order to investigate network hubs and their classification into provincial or connector hubs. Measures were investigated in a range of low to medium graph density.

resultsThe group of patients presented lower global segregation than HC while showing higher global but lower local integration. They also failed to engage regions that comprise the default-mode network (DMN) as hubs such as bilateral medial frontal regions, PCC/precuneus complex, and right inferior parietal lobule, which were present in controls. Furthermore, the cerebellum in subjects with mTLE seemed to be playing a major role in the integration of their functional networks, which was evident through the engagement of cerebellar regions as connector hubs.

conclusionsFunctional networks in subjects with mTLE presented both global and local abnormalities compared to healthy subjects. Specifically, there was significant separation between groups, with lower global segregation and slightly higher global integration observed in patients. This could be indicative of a network that is working as a whole instead of in segregated or specialized communities, which could translate into a less robust network and more prone to disruption in the group with epilepsy. Furthermore, functional irregularities were also observed in the group of patients in terms of the engagement of cerebellar regions as hubs while failing to engage DMN-related areas as major hubs in the network. The use of two differentially defined graphs synergistically contributed to findings.

Indexed as

AdultAtrophyCognitive DysfunctionEpilepsy, Temporal LobeFemaleFunctional LateralityHippocampusHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMiddle AgedParietal LobeSclerosisFunctional hubsGraph theory analysisMesial temporal lobe epilepsyResting-state fMRI

Identifiers

PMID27082649
PMCPMC4867275

What OpenQuestion holds

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LicenceTDM
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.