Evidence map›Paper›PMID 22621942›Full record

ArticleBrain stimulation2013

High frequency stimulation can suppress globally seizures induced by 4-AP in the rat hippocampus: an acute in vivo study.

Chia-Chu Chiang, Chou-Ching K Lin, Ming-Shaung Ju, Dominique M Durand

Open access · greenAbstract read
In one paragraph

Article in Brain stimulation, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
0.7field-weighted citation impact, top 36% of its field
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

14 citing papers in PubMed, 31 citations in OpenAlex.

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  7. [A new algorithm for automatically detecting epileptiform spikes and its application in epilepsy models].Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi · 2017
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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 at 3 institutions in 2 countries.

Chia-Chu ChiangDepartment of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan. n1897134@ccmail.ncku.edu.tw
Chou-Ching K Lin
Ming-Shaung Ju
Dominique M Durand
National Cheng Kung University · TWCase Western Reserve University · USNational Cheng Kung University Hospital · TW

Funding

Detection and Control of EpilepsyR01NS060757 · NINDS · CASE WESTERN RESERVE UNIVERSITY · PI DURAND, DOMINIQUE M · 2008 to 2016
$2.8M
NINDS NIH HHS R01 NS060757
6 · The paper itself

Abstract

backgroundHigh frequency stimulation (HFS) on the hippocampus can locally suppress epileptiform activity in-vitro and decrease seizure frequency in vivo. In-vitro HFS on the ventral commissural tract, a novel target, was shown to block the axonal conduction and suppress activity in the CA1 and CA3 neuron.

objectiveTo study the spatial extent of seizure suppression by HFS applied on the tract and focus site in an in vivo experiment.

methodsFive adult Sprague-Dawley rats were used for the study. Six electrodes were placed on the septal, middle, and temporal hippocampus bilaterally to simultaneously record seizure activity in the entire hippocampus. Seizure activity was induced by injecting 4-aminopyridine (4-AP) into the right middle part of the hippocampus. Following induction, HFS (100 Hz) was applied to the tract and the focus site at 100, 300 and 500 μA.

resultsThe induced seizure activity was dominated by two patterns, high frequency spiking and pseudo-periodic spikes. Either tract or focus site stimulation could generate suppression of only the pseudo-periodic spikes. The suppression rates were dependent on stimulation amplitude (P < 0.005, chi square test). However, HFS also caused conversion of the seizure pattern. The conversion rates increased with higher stimulation amplitudes and were higher with focus site stimulation (P < 0.01, Fisher's exact test).

conclusionsThe results of this study have two practical implications [1], both tract and focus site stimulation can produce global suppression of hippocampus and [2] the choice of stimulation parameters is critical in order to produce suppression, but not conversion, of seizure pattern.

Indexed as

4-AminopyridineAnimalsElectric StimulationHippocampusNeuronsRatsRats, Sprague-DawleySeizuresSynaptic Transmission4-Aminopyridine

Identifiers

PMID22621942
PMCPMC3624017
OpenAlexW1973466749

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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.