Evidence map›Paper›PMID 24646791›Full record

ArticlePloS one2014

Suppression of motor cortical excitability in anesthetized rats by low frequency repetitive transcranial magnetic stimulation.

Paul A Muller, Sameer C Dhamne, Andrew M Vahabzadeh-Hagh, Alvaro Pascual-Leone, Frances E Jensen, Alexander Rotenberg

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 1 pooled it
6.2field-weighted citation impact, top 4% 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

34 citing papers in PubMed, 1 synthesis or guideline pooled it, 73 citations in OpenAlex.

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  9. Assessing the mechanisms of brain plasticity by transcranial magnetic stimulation.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2023
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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

6 authors at 5 institutions in 2 countries.

Paul A MullerDepartment of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America.
Sameer C DhamneDepartment of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America.
Andrew M Vahabzadeh-HaghDepartment of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America; Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America.
Alvaro Pascual-LeoneBerenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America; Institut Universitari de Neurorehabilitació Guttmann, Universidad Autónoma de Barcelona, Badalona, Spain.
Frances E JensenDepartment of Neurology, Perelman School of Medicine, University of Pennsylvania Health System, Philadelphia, Pennsylvania, United States of America.
Alexander RotenbergDepartment of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, United States of America; Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America.
Boston Children's Hospital · USBeth Israel Deaconess Medical Center · USHarvard University · USUniversitat Autònoma de Barcelona · ESUniversity of Pennsylvania Health System · US

Funding

SYNAPTIC MECHANISMS IN HIPPOCAMPAL EPILEPTOGENESISP30HD018655 · NICHD · CHILDREN'S HOSPITAL BOSTON · PI POMEROY, SCOTT LOREN · 1985 to 2015
$26.2M
The Epileptogenic Effect of Perinatal HypoxiaR01NS031718 · NINDS · CHILDREN'S HOSPITAL BOSTON · PI JENSEN, FRANCES E · 1997 to 2011
$3.8M
Antiepileptogenesis by Transcranial Magnetic StimulationK08NS055895 · NINDS · BOSTON CHILDREN'S HOSPITAL · PI ROTENBERG, ALEXANDER · 2007 to 2011
$867k
NICHD NIH HHS P30 HD018655NICHD NIH HHS P30-HD18655NINDS NIH HHS 5R01NS031718NINDS NIH HHS K08 NS055895NINDS NIH HHS R01 NS031718
6 · The paper itself

Abstract

Repetitive transcranial magnetic stimulation (rTMS) is a widely-used method for modulating cortical excitability in humans, by mechanisms thought to involve use-dependent synaptic plasticity. For example, when low frequency rTMS (LF rTMS) is applied over the motor cortex, in humans, it predictably leads to a suppression of the motor evoked potential (MEP), presumably reflecting long-term depression (LTD) -like mechanisms. Yet how closely such rTMS effects actually match LTD is unknown. We therefore sought to (1) reproduce cortico-spinal depression by LF rTMS in rats, (2) establish a reliable animal model for rTMS effects that may enable mechanistic studies, and (3) test whether LTD-like properties are evident in the rat LF rTMS setup. Lateralized MEPs were obtained from anesthetized Long-Evans rats. To test frequency-dependence of LF rTMS, rats underwent rTMS at one of three frequencies, 0.25, 0.5, or 1 Hz. We next tested the dependence of rTMS effects on N-methyl-D-aspartate glutamate receptor (NMDAR), by application of two NMDAR antagonists. We find that 1 Hz rTMS preferentially depresses unilateral MEP in rats, and that this LTD-like effect is blocked by NMDAR antagonists. These are the first electrophysiological data showing depression of cortical excitability following LF rTMS in rats, and the first to demonstrate dependence of this form of cortical plasticity on the NMDAR. We also note that our report is the first to show that the capacity for LTD-type cortical suppression by rTMS is present under barbiturate anesthesia, suggesting that future neuromodulatory rTMS applications under anesthesia may be considered.

Indexed as

Transcranial Magnetic StimulationAnesthesia, GeneralAnimalsDizocilpine MaleateElectromagnetic RadiationEvoked Potentials, MotorExcitatory Amino Acid AntagonistsLong-Term Synaptic DepressionMaleMotor CortexNeuronal PlasticityRatsRats, Long-EvansReceptors, N-Methyl-D-AspartateDizocilpine MaleateExcitatory Amino Acid AntagonistsReceptors, N-Methyl-D-Aspartate

Identifiers

PMID24646791
PMCPMC3960125
OpenAlexW2117052856

What OpenQuestion holds

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LicenceCC BY
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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.