Evidence map›Paper›PMID 28472428›Full record

ArticleNeurosurgery2018

Granger Causality Analysis of Interictal iEEG Predicts Seizure Focus and Ultimate Resection.

Eun-Hyoung Park, Joseph R Madsen

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Article in Neurosurgery, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

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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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3 · Its place in the literature

Who cites it

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

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  19. Magnetoencephalographic Mapping of Epileptic Spike Population Using Distributed Source Analysis: Comparison With Intracranial Electroencephalographic Spikes.Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society · 2018
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4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

2 authors.

Eun-Hyoung ParkDepartment of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.
Joseph R MadsenDepartment of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA critical conceptual step in epilepsy surgery is to locate the causal region of seizures. In practice, the causal region may be inferred from the set of electrodes showing early ictal activity. There would be advantages in deriving information about causal regions from interictal data as well. We applied Granger's statistical approach to baseline interictal data to calculate causal interactions. We hypothesized that maps of the Granger causality network (or GC maps) from interictal data might inform about the seizure network, and set out to see if "causality" in the Granger sense correlated with surgical targets.

objectiveTo determine whether interictal baseline data could produce GC maps, and whether the regions of high GC would statistically resemble the topography of the ictally active electrode (IAE) set and resection.

methodsTwenty-minute interictal baselines obtained from 25 consecutive patients were analyzed. The "GC maps" were quantitatively compared to conventionally constructed surgical plans, by using rank order and Cartesian distance statistics.

resultsIn 16 of 25 cases, the interictal GC rankings of the electrodes in the IAE set were lower than predicted by chance (P < .05). The aggregate probability of such a match by chance alone is very small (P < 10-20) suggesting that interictal GC maps correlated with ictal networks. The distance of the highest GC electrode to the IAE set and to the resection averaged 4 and 6 mm (Wilcoxon P < .001).

conclusionGC analysis has the potential to help localize ictal networks from interictal data.

Indexed as

AdolescentChildChild, PreschoolDrug Resistant EpilepsyElectroencephalographyFemaleFollow-Up StudiesHumansMalePredictive Value of TestsProbabilityRetrospective StudiesSeizuresYoung AdultCausal connectivityEpilepsy surgeryIntracranial EEGSeizure networksSurgical planning

Identifiers

PMID28472428
PMCPMC5808502

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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.