Evidence map›Paper›PMID 34298414›Full record

ArticleClinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology2021

A reexamination of motor and prefrontal TMS in tobacco use disorder: Time for personalized dosing based on electric field modeling?

Kevin A Caulfield, Xingbao Li, Mark S George

Open access · greenAbstract read
In one paragraph

Article in Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 2 pooled it
2.6field-weighted citation impact, top 10% 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

20 citing papers in PubMed, 2 syntheses or guidelines pooled it, 38 citations in OpenAlex.

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  12. Electric-field-based dosing for TMS.Imaging neuroscience (Cambridge, Mass.) · 2024
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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

3 authors at 1 institution in 1 country.

Kevin A CaulfieldBrain Stimulation Laboratory, Department of Psychiatry, Medical University of South Carolina, Charleston, SC, USA. Electronic address: caulfiel@musc.edu.
Xingbao LiBrain Stimulation Laboratory, Department of Psychiatry, Medical University of South Carolina, Charleston, SC, USA.
Mark S GeorgeBrain Stimulation Laboratory, Department of Psychiatry, Medical University of South Carolina, Charleston, SC, USA; Ralph H. Johnson VA Medical Center, Charleston, SC, USA.
Medical University of South Carolina · US

Funding

RTMS manipulates imbalanced drive-reward and executive control circuitry for smoking cessationUG3DA048507 · NIDA · MEDICAL UNIVERSITY OF SOUTH CAROLINA · PI LI, XINGBAO · 2021 to 2022
$711k
Developing rTMS as a Potential Treatment for Nicotine AddictionR21DA036752 · NIDA · MEDICAL UNIVERSITY OF SOUTH CAROLINA · PI LI, XINGBAO · 2014 to 2015
$408k
Personalizing tDCS Dose in Healthy Adults and Chronic Ischemic StrokeF31NS126019 · NINDS · MEDICAL UNIVERSITY OF SOUTH CAROLINA · PI CAULFIELD, KEVIN A. · 2022 to 2023
$81k
NIDA NIH HHS R21 DA036752NIDA NIH HHS UG3 DA048507NINDS NIH HHS F31 NS126019
6 · The paper itself

Abstract

objectiveIn this study, we reexamined the use of 120% resting motor threshold (rMT) dosing for transcranial magnetic stimulation (TMS) over the left dorsolateral prefrontal cortex (DLPFC) using electric field modeling.

methodsWe computed electric field models in 38 tobacco use disorder (TUD) participants to compare figure-8 coil induced electric fields at 100% rMT over the primary motor cortex (M1), and 100% and 120% rMT over the DLPFC. We then calculated the percentage of rMT needed for motor-equivalent induced electric fields at the DLPFC and modeled this intensity for each person.

resultsElectric fields from 100% rMT stimulation over M1 were significantly larger than what was modeled in the DLPFC using 100% rMT (p < 0.001) and 120% rMT stimulation (p = 0.013). On average, TMS would need to be delivered at 133.5% rMT (range = 79.9 to 247.5%) to produce motor-equivalent induced electric fields at the DLPFC of 158.2 V/m.

conclusionsTMS would have to be applied at an average of 133.5% rMT over the left DLPFC to produce equivalent electric fields to 100% rMT stimulation over M1 in these 38 TUD patients. The high interindividual variability between motor and prefrontal electric fields for each participant supports using personalized electric field modeling for TMS dosing to ensure that each participant is not under- or over-stimulated. SIGNIFICANCE: These electric field modeling in TUD data suggest that 120% rMT stimulation over the DLPFC delivers sub-motor equivalent electric fields in many individuals (73.7%). With further validation, electric field modeling may be an impactful method of individually dosing TMS.

Indexed as

AdultEvoked Potentials, MotorFemaleHumansMaleMiddle AgedMotor CortexPrecision MedicinePrefrontal CortexTobacco Use DisorderTranscranial Magnetic StimulationYoung AdultElectric field modelingFinite element methodMotor thresholdPersonalized dosingTobacco use disorderTranscranial magnetic stimulation (TMS)

Identifiers

PMID34298414
PMCPMC8384673
OpenAlexW3180194139

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.