Evidence map›Paper›PMID 35278361›Full record

ArticleNeuron2022

Neural correlates of blood flow measured by ultrasound.

Anwar O Nunez-Elizalde, Michael Krumin, Charu Bai Reddy, Gabriel Montaldo, Alan Urban, Kenneth D Harris, Matteo Carandini

Open access · hybridAbstract read
In one paragraph

Article in Neuron, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
6.5field-weighted citation impact, top 2% 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

48 citing papers in PubMed, 84 citations in OpenAlex.

  1. Article
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  8. Microglia Modulate Information Processing in the Mouse Barrel Cortex.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2026
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  9. Opioid-specific brain connectivity dynamics distinguish analgesia from secondary effects: Studies in male mice.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  11. Brainwide blood volume reflects opposing neural populations.bioRxiv : the preprint server for biology · 2025
    Article
  12. Article
  13. Article
  14. Ketamine-induced static and dynamic functional connectivity changes are modulated by opioid receptors and biological sex in rats.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2025
    Article
  15. Article
  16. Exploring Neural Dynamics in the Auditory Telencephalon of Crows Using Functional Ultrasound Imaging.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  17. Article
  18. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 2 countries.

Anwar O Nunez-ElizaldeUCL Institute of Ophthalmology, University College London, London WC1E 6AE, UK. Electronic address: anwarnunez@gmail.com.
Michael KruminUCL Institute of Ophthalmology, University College London, London WC1E 6AE, UK.
Charu Bai ReddyUCL Institute of Ophthalmology, University College London, London WC1E 6AE, UK.
Gabriel MontaldoNeuro-Electronics Research Flanders, 3001 Leuven, Belgium; Vlaams Instituut voor Biotechnologie (VIB), 3000 Leuven, Belgium; imec, 3001 Leuven, Belgium; Department of Neuroscience, KU Leuven, 3000 Leuven, Belgium.
Alan UrbanNeuro-Electronics Research Flanders, 3001 Leuven, Belgium; Vlaams Instituut voor Biotechnologie (VIB), 3000 Leuven, Belgium; imec, 3001 Leuven, Belgium; Department of Neuroscience, KU Leuven, 3000 Leuven, Belgium.
Kenneth D HarrisUCL Queen Square Institute of Neurology, University College London, London WC1E 6AE, UK.
Matteo CarandiniUCL Institute of Ophthalmology, University College London, London WC1E 6AE, UK. Electronic address: m.carandini@ucl.ac.uk.
University College London · GBVlaams Instituut voor Biotechnologie · BEEnergy Institute · GBNational Hospital for Neurology and Neurosurgery · GB

Funding

State-dependent Decision-making in Brainwide Neural CircuitsU19NS123716 · NINDS · COLUMBIA UNIV NEW YORK MORNINGSIDE · PI ZADOR, ANTHONY M · 2021 to 2025
$18.2M
NINDS NIH HHS U19 NS123716Wellcome TrustWellcome Trust 205093/Z/16/Z
6 · The paper itself

Abstract

Functional ultrasound imaging (fUSI) is an appealing method for measuring blood flow and thus infer brain activity, but it relies on the physiology of neurovascular coupling and requires extensive signal processing. To establish to what degree fUSI trial-by-trial signals reflect neural activity, we performed simultaneous fUSI and neural recordings with Neuropixels probes in awake mice. fUSI signals strongly correlated with the slow (<0.3 Hz) fluctuations in the local firing rate and were closely predicted by the smoothed firing rate of local neurons, particularly putative inhibitory neurons. The optimal smoothing filter had a width of ∼3 s, matched the hemodynamic response function of awake mice, was invariant across mice and stimulus conditions, and was similar in the cortex and hippocampus. fUSI signals also matched neural firing spatially: firing rates were as highly correlated across hemispheres as fUSI signals. Thus, blood flow measured by ultrasound bears a simple and accurate relationship to neuronal firing.

Indexed as

HemodynamicsNeurovascular CouplingAnimalsCerebral CortexMiceNeuronsUltrasonographyelectrophysiologyhemodynamic couplingmiceultrasound measurements

Identifiers

PMID35278361
PMCPMC9235295
OpenAlexW4220807143

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.