Evidence map›Paper›PMID 33217607›Full record

ArticleBrain stimulation

Rapid, Dose-Dependent Enhancement of Cerebral Blood Flow by transcranial AC Stimulation in Mouse.

Dennis A Turner, Simone Degan, Francesca Galeffi, Stephen Schmidt, Angel V Peterchev

Open access · goldAbstract read
In one paragraph

Article in Brain stimulation. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
1.7field-weighted citation impact, top 15% 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

22 citing papers in PubMed, 42 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

5 authors at 1 institution in 1 country.

Dennis A TurnerNeurosurgery, Duke University, USA; Neurobiology, Duke University, USA; Biomedical Engineering, Duke University, USA; Surgery and Research Branches, Durham VAMC, Durham, NC, 27710, USA. Electronic address: dennis.turner@duke.edu.
Simone DeganNeurosurgery, Duke University, USA; Surgery and Research Branches, Durham VAMC, Durham, NC, 27710, USA.
Francesca GaleffiNeurosurgery, Duke University, USA; Surgery and Research Branches, Durham VAMC, Durham, NC, 27710, USA.
Stephen SchmidtNeurosurgery, Duke University, USA; Biomedical Engineering, Duke University, USA.
Angel V PeterchevNeurosurgery, Duke University, USA; Psychiatry & Behavioral Sciences, Duke University, USA; Biomedical Engineering, Duke University, USA; Electrical & Computer Engineering, Duke University, USA.
Duke University · US

Funding

Rational Optimization of tACS for Targeting Thalamo-Cortical OscillationsR01MH111889 · NIMH · UNIV OF NORTH CAROLINA CHAPEL HILL · PI FROHLICH, FLAVIO · 2016 to 2019
$2.4M
Hippocampal Neurovascular Plasticity in CVN-AD Mouse: Fornix-Septal StimulationR21AG051103 · NIA · DUKE UNIVERSITY · PI TURNER, DENNIS ALAN · 2016 to 2017
$423k
Fornix Stimulation Enhances Neurovascular Plasticity in Alzheimer's Mouse ModelI21BX003023 · VA · DURHAM VA MEDICAL CENTER · PI TURNER, DENNIS ALAN · 2016 to 2017
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Delayed Septal/Fornix Brain Stimulation after Repetitive Closed Head InjuryI21RX002223 · VA · DURHAM VA MEDICAL CENTER · PI TURNER, DENNIS ALAN · 2017 to 2018
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BLRD VA I21 BX003023NIA NIH HHS R21 AG051103NIMH NIH HHS R01 MH111889RRD VA I21 RX002223
6 · The paper itself

Abstract

backgroundTranscranial electrical stimulation at an appropriate dose may demonstrate intracranial effects, including neuronal stimulation and cerebral blood flow responses.

objectiveWe performed in vivo experiments on mouse cortex using transcranial alternating current [AC] stimulation to assess whether cerebral blood flow can be reliably altered by extracranial stimulation.

methodsWe performed transcranial AC electrical stimulation transversely across the closed skull in anesthetized mice, measuring transcranial cerebral blood flow with a laser Doppler probe and intracranial electrical responses as endpoint biomarkers. We calculated a stimulation dose-response function between intracranial electric field and cerebral blood flow.

resultsStimulation at electric field amplitudes of 5-20 mV/mm at 10-20 Hz rapidly increased cerebral blood flow (within 100 ms), which then quickly decreased with no residual effects. The time to peak and blood flow shape varied with stimulation intensity and duration, showing a linear correlation between stimulation dose and peak blood flow increase. Neither afterdischarges nor spreading depression occurred from this level of stimulation.

conclusionsExtracranial stimulation amplitudes sufficient to evoke reliable blood flow changes require electric field strengths higher than what is tolerable in unanesthetized humans (<1 mV/mm), but less than electroconvulsive therapy levels (>40 mV/mm). However, anesthesia effects, spontaneous blood flow fluctuations, and sampling error may accentuate the apparent field strength needed for enhanced blood flow. The translation to a human dose-response function to augment cerebral blood flow (i.e., in stroke recovery) will require significant modification, potentially to pericranial, focused, multi-electrode application or intracranial stimulation.

Indexed as

Transcranial Direct Current StimulationAnimalsCerebral CortexCerebrovascular CirculationDeep Brain StimulationHumansMaleMiceNeuronsUltrasonography, Doppler, TranscranialAlzheimer’s diseaseCerebral blood flowElectric fieldExtracranial electrical stimulationStrokeTranscranial AC stimulation

Identifiers

PMID33217607
PMCPMC7855527
OpenAlexW3101961883

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.