Evidence map›Paper›PMID 26661241›Full record

ArticleJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism2016

The major cerebral arteries proximal to the Circle of Willis contribute to cerebrovascular resistance in humans.

Esther A H Warnert, Emma C Hart, Judith E Hall, Kevin Murphy, Richard G Wise

Open access · bronzeAbstract read
In one paragraph

Article in Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

19 citing papers in PubMed, 39 citations in OpenAlex.

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  10. Cardiorespiratory fitness is associated with increased middle cerebral arterial compliance and decreased cerebral blood flow in young healthy adults: A pulsed ASL MRI study.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2020
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  13. Reactivity of larger intracranial arteries using 7 T MRI in young adults.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2019
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  18. Aerobic exercise prevents rarefaction of pial collaterals and increased stroke severity that occur with aging.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 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

5 authors at 2 institutions in 1 country.

Esther A H WarnertCardiff University Brain Research Imaging Centre, School of Psychology, Cardiff University, Cardiff, UK.
Emma C HartBHI CardioNomics Research Group, School of Physiology and Pharmacology, University of Bristol, Bristol, UK.
Judith E HallDepartment of Anaesthetics and Intensive Care Medicine, School of Medicine, Cardiff University, Cardiff, UK.
Kevin MurphyCardiff University Brain Research Imaging Centre, School of Psychology, Cardiff University, Cardiff, UK.
Richard G WiseCardiff University Brain Research Imaging Centre, School of Psychology, Cardiff University, Cardiff, UK wiserg@cardiff.ac.uk.
Cardiff University · GBUniversity of Bristol · GB

Funding

British Heart Foundation FS/11/1/28400Wellcome Trust 090199
6 · The paper itself

Abstract

Cerebral autoregulation ensures constant cerebral blood flow during periods of increased blood pressure by increasing cerebrovascular resistance. However, whether this increase in resistance occurs at the level of major cerebral arteries as well as at the level of smaller pial arterioles is still unknown in humans. Here, we measure cerebral arterial compliance, a measure that is inversely related to cerebrovascular resistance, with our novel non-invasive magnetic resonance imaging-based measurement, which employs short inversion time pulsed arterial spin labelling to map arterial blood volume at different phases of the cardiac cycle. We investigate the differential response of the cerebrovasculature during post exercise ischemia (a stimulus which leads to increased cerebrovascular resistance because of increases in blood pressure and sympathetic outflow). During post exercise ischemia in eight normotensive men (30.4 ± 6.4 years), cerebral arterial compliance decreased in the major cerebral arteries at the level of and below the Circle of Willis, while no changes were measured in arteries above the Circle of Willis. The reduction in arterial compliance manifested as a reduction in the arterial blood volume during systole. This study provides the first evidence that in humans the major cerebral arteries may play an important role in increasing cerebrovascular resistance.

Indexed as

AdultBlood PressureBlood VolumeCerebral ArteriesCerebrovascular CirculationCircle of WillisHumansImage Processing, Computer-AssistedIsometric ContractionMagnetic Resonance ImagingMaleMonitoring, PhysiologicMusclesPulsatile FlowSpin LabelsSympathetic Nervous SystemSpin LabelsArterial compliancearterial spin labellingcerebral autoregulationpost exercise ischemiasympathetic nervous activity

Identifiers

PMID26661241
PMCPMC4976750
OpenAlexW1870146035

What OpenQuestion holds

Textmetadata
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.