Evidence map›Paper›PMID 36522656›Full record

ReviewFluids and barriers of the CNS2022

Measurements of cerebrospinal fluid production: a review of the limitations and advantages of current methodologies.

Guojun Liu, Antonio Ladrón-de-Guevara, Yara Izhiman, Maiken Nedergaard, Ting Du

Open access · goldAbstract readReview
In one paragraph

Review in Fluids and barriers of the CNS, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
7.7field-weighted citation impact, top 1% 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

44 citing papers in PubMed, 77 citations in OpenAlex.

  1. Quantitative assessment of flow between cerebrospinal and interstitial fluid compartments in humans.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  7. Human deep sleep facilitates cerebrospinal fluid dynamics linked to spontaneous brain oscillations and neural events.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  19. Quantitative and qualitative investigation of shunt failure in anFrontiers in bioengineering and biotechnology · 2025
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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 3 countries.

Guojun LiuDepartment of Neurosurgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, China.
Antonio Ladrón-de-GuevaraCenter for Translational Neuromedicine, Department of Neurosurgery, University of Rochester Medical Center, Rochester, NY, 14642, USA.
Yara IzhimanCenter for Translational Neuromedicine, Department of Neurosurgery, University of Rochester Medical Center, Rochester, NY, 14642, USA.
Maiken NedergaardCenter for Translational Neuromedicine, Faculty of Health and Medical Sciences, University of Copenhagen, 2200, Copenhagen, Denmark. nedergaard@sund.ku.dk.
Ting DuSchool of Pharmacy, China Medical University, Shenyang, 110122, China. duting_611@163.com.
University of Rochester Medical Center · USChina Medical University · CN

Funding

Viral Tool Development Core: Visualization and manipulation of brain fluid dynamics by recombinant viral vectorsU19NS128613 · NINDS · UNIVERSITY OF ROCHESTER · PI Maiken Nedergaard · 2022 to 2026
$13.6M
Para-Vascular Basis of Small Vessel DiseaseR01NS100366 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2016 to 2020
$3.8M
Age and AD related bottlenecks in glymphatic-lymphatic waste transportRF1AG057575 · NIA · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2017 to 2017
$3.2M
The glymphatic system at the crossroad of integrative health approaches inchronic painR01AT011439 · NCCIH · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2021 to 2025
$3.1M
CRCNS: Waste-clearance flows in the brain measured using physics-informed neural networkR01AT012312 · NCCIH · UNIVERSITY OF ROCHESTER · PI Douglas H Kelley · 2022 to 2026
$1.6M
NCCIH NIH HHS R01 AT011439NCCIH NIH HHS R01 AT012312NIA NIH HHS RF1 AG057575NINDS NIH HHS R01 NS100366NINDS NIH HHS U19 NS128613the EU Horizon 2020 research and innovation program grant 666881The European Research Council under the European Union's Horizon 2020 research and innovation programme 742112the National Institute of Neurological Disorders and Stroke grant R01NS100366the National Institute on Aging RF1AG057575the US Army Research Office grant MURI W911NF1910280HT
6 · The paper itself

Abstract

Cerebrospinal fluid (CSF) is an essential and critical component of the central nervous system (CNS). According to the concept of the "third circulation" originally proposed by Cushing, CSF is mainly produced by the choroid plexus and subsequently leaves the cerebral ventricles via the foramen of Magendie and Luschka. CSF then fills the subarachnoid space from whence it disperses to all parts of the CNS, including the forebrain and spinal cord. CSF provides buoyancy to the submerged brain, thus protecting it against mechanical injury. CSF is also transported via the glymphatic pathway to reach deep interstitial brain regions along perivascular channels; this CSF clearance pathway promotes transport of energy metabolites and signaling molecules, and the clearance of metabolic waste. In particular, CSF is now intensively studied as a carrier for the removal of proteins implicated in neurodegeneration, such as amyloid-β and tau. Despite this key function of CSF, there is little information about its production rate, the factors controlling CSF production, and the impact of diseases on CSF flux. Therefore, we consider it to be a matter of paramount importance to quantify better the rate of CSF production, thereby obtaining a better understanding of CSF dynamics. To this end, we now review the existing methods developed to measure CSF production, including invasive, noninvasive, direct, and indirect methods, and MRI-based techniques. Depending on the methodology, estimates of CSF production rates in a given species can extend over a ten-fold range. Throughout this review, we interrogate the technical details of CSF measurement methods and discuss the consequences of minor experimental modifications on estimates of production rate. Our aim is to highlight the gaps in our knowledge and inspire the development of more accurate, reproducible, and less invasive techniques for quantitation of CSF production.

Indexed as

Central Nervous SystemGlymphatic SystemBrainCerebral VentriclesCerebrospinal FluidSubarachnoid SpaceCerebrospinal fluidChoroid plexusCSF dynamicsCSF production rate

Identifiers

PMID36522656
PMCPMC9753305
OpenAlexW4311610121

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.