Evidence map›Paper›PMID 32259609›Full record

ArticleJournal of neuroscience methods2020

Focal transcranial magnetic stimulation in awake rats: Enhanced glucose uptake in deep cortical layers.

Samantha Cermak, Qinglei Meng, Kevin Peng, Simone Baldwin, Carlos A Mejías-Aponte, Yihong Yang, Hanbing Lu

Open access · greenAbstract read
In one paragraph

Article in Journal of neuroscience methods, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
1.0field-weighted citation impact, top 24% 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

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

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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 at 1 institution in 1 country.

Samantha CermakNeuroimaging Research Branch, Histology Core, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, MD, 21224, USA.
Qinglei MengNeuroimaging Research Branch, Histology Core, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, MD, 21224, USA.
Kevin PengNeuroimaging Research Branch, Histology Core, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, MD, 21224, USA.
Simone BaldwinNeuroimaging Research Branch, Histology Core, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, MD, 21224, USA.
Carlos A Mejías-AponteNeuroimaging Research Branch, Histology Core, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, MD, 21224, USA.
Yihong YangNeuroimaging Research Branch, Histology Core, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, MD, 21224, USA. Electronic address: yihongyang@mail.nih.gov.
Hanbing LuNeuroimaging Research Branch, Histology Core, National Institute on Drug Abuse (NIDA), National Institutes of Health (NIH), Baltimore, MD, 21224, USA. Electronic address: luha@mail.nih.gov.
National Institutes of Health · US

Funding

Neuroimaging of preclinical models of substance use disordersZIADA000638 · NIDA · NATIONAL INSTITUTE ON DRUG ABUSE · PI YANG, YIHONG · 2021 to 2025
$12.5M
Animal MRI/MRS Methodological Development for Drug Addiction ApplicationsZIADA000545 · NIDA · NATIONAL INSTITUTE ON DRUG ABUSE · PI YANG, YIHONG · 2009 to 2020
$10.2M
Intramural NIH HHS Z99 DA999999Intramural NIH HHS ZIA DA000545Intramural NIH HHS ZIA DA000638
6 · The paper itself

Abstract

backgroundTranscranial magnetic stimulation (TMS) is an emerging neuromodulation tool. However, preclinical models of TMS are limited.

objectiveTo develop a method for performing TMS in awake rats and to characterize neuronal response to TMS by mapping glucose uptake following TMS administration.

methodsA headpost was implanted into rat skull serving as a refence to guide TMS target. Motor threshold measurement was used as the metric to assess the consistency in TMS delivery across animals and across sessions. Using a fluorescent glucose analogue (2-NBDG) as a marker of neuronal activity, we mapped glucose uptake in response to TMS of the rat motor cortex.

resultsThe average motor threshold (n = 41) was 34.6 ± 6.3 % of maximum stimulator output (MSO). The variability of motor threshold across animals was similar to what has been reported in human studies. Furthermore, there was no significant difference in motor threshold measured across 3 separate days. Enhancement in fluorescent signals were TMS dose (power)-dependent, which centered around the motor cortex, covering an area medial-laterally 2 mm, rostral-caudally 4 mm at 55 % MSO, and 3 mm at 35 % MSO. The count of total cells with significant fluorescent signal was: 107 ± 23 (55 % MSO), 73 ± 11 (35 % MSO) and 42 ± 11 (sham, 5% MSO).

conclusionsOur method allows for consistent motor threshold assessment for longitudinal studies. Notably, cells with fluorescent signal enhancement were consistently aggregated in deep cortical layers, with minimal enhancement in superficial layers COMPARISONS WITH EXISTING METHOD(S): To our knowledge, this is the first study of focal TMS in awake rodents.

Indexed as

Motor CortexTranscranial Magnetic StimulationAnimalsEvoked Potentials, MotorGlucoseLongitudinal StudiesRatsWakefulnessGlucose2-DG2-NBDGFluorescenceFocal TMSGlucose

Identifiers

PMID32259609
PMCPMC8917821
OpenAlexW3014867822

What OpenQuestion holds

Textmetadata
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.