PreprintCited by 98Functional Brain Connectivity StudiesAdvanced MRI Techniques and ApplicationsAdvanced Neuroimaging Techniques and Applications

Metabolic and Haemodynamic Resting-State Connectivity of the Human Brain: A High-Temporal Resolution Simultaneous BOLD-FMRI and FDG-FPET Multimodality Study

Open access
Jamadar, Sharna D, Ward, Phillip GD, Liang, Emma Xingwen, Orchard, Edwina R, Chen, Zhaolin, Egan, Gary F·2020·Cerebral Cortex

Abstract

Simultaneous FDG-PET/fMRI ([18F]-fluorodeoxyglucose positron emission tomography functional magnetic resonance imaging) provides the capacity to image two sources of energetic dynamics in the brain – glucose metabolism and haemodynamic response. Functional fMRI connectivity has been enormously useful for characterising interactions between distributed brain networks in humans. Metabolic connectivity based on static FDG-PET has been proposed as a biomarker for neurological disease; but static FDG-PET cannot be used to estimate subjectlevel measures of connectivity , only across-subject covariance . Here, we applied high-temporal resolution constant infusion fPET to measure subject-level metabolic connectivity simultaneously with fMRI connectivity. fPET metabolic connectivity was characterised by fronto-parietal connectivity within and between hemispheres. fPET metabolic connectivity showed moderate similarity with fMRI primarily in superior cortex and frontoparietal regions. Significantly, fPET metabolic connectivity showed little similarity with static FDG-PET metabolic covariance, indicating that metabolic brain connectivity is a non-ergodic process whereby individual brain connectivity cannot be inferred from group level metabolic covariance. Our results highlight the complementary strengths of fPET and fMRI in measuring the intrinsic connectivity of the brain, and open up the opportunity for novel fundamental studies of human brain connectivity as well as multi-modality biomarkers of neurological diseases.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1101/2020.05.01.071662

Cites

82 of 82 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Aerobic glycolysis and lactate might reflect cortical information processing and, in turn, intracortical communication.

    “In particular, aerobic glycolysis and lactate might reflect cortical information processing and, in turn, intracortical communication”

    From Perception is associated with the brain’s metabolic response to sensory stimulation (2022) · cites this paper as Jamadar et al., 2020

    The section ‘Metabolic connectivity is predominantly evident in fronto-parietal regions’ (page unavailable) links glucose uptake to neuronal function and reports connectivity between cortical networks. It does not say that aerobic glycolysis or lactate reflects cortical information processing or intracortical communication; the only retrieved mention of aerobic glycolysis is a reference title. (LLM, conf=0.78)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. Sudarshan, V.P., Li, S., Jamadar, S.D., Egan, G.F., Awate, S.P., Chen, Z., 2020. Improved temporal resolution for mapping brain metabolism using functional PET and anatomical MRI knowledge (preprint). Neuroscience. https://doi.org/10.1101/2020.07.08.192872 · DOI

Cited by

Sorted by citations

Authors
Jamadar, S. D., Ward, P. G., Liang, E. X., Orchard, E. R., Chen, Z., & Egan, G. F.
Affiliations
  • Australian Research Council (AU)
  • Monash University (AU)
Corresponding author
Jamadar, Sharna D
Venue
Cerebral Cortex
Publisher
openRxiv
Published
2020-05-03
Volume
31
Issue
6
Pages
2855-2867
ISSN
1047-3211 (ISSN-L)
OpenAlex
W3126355511
Cited by
98
References
79
Citations by year
2026: 24 · 2025: 24 · 2024: 15 · 2023: 15 · 2022: 12 · 2021: 7 · 2020: 1
FWCI
6.45
Type
journal article
Language
en
Open access
Locations
  • Cerebral Cortex (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Siemens Healthineers
  • Australian Research Council (LP170100494)
  • National Health and Medical Research Council (1174164)
  • Centre of Excellence for Integrative Brain Function, Australian Research Council (CE140100007)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
resting-state brain connectivity, metabolic connectivity, FDG-PET, BOLD fMRI, frontoparietal connectivity, interhemispheric connectivity, ergodicity breaking, neurological disorders
MeSH terms
Adolescent, Brain, Female, Glucose, Hemodynamics, Humans, Magnetic Resonance Imaging, Male, Nerve Net, Rest, Fluorodeoxyglucose F18, Positron-Emission Tomography, Young Adult, Multimodal Imaging

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review