Evidence map›Paper›PMID 37547265›Full record

ArticleNeuro-oncology advances

Investigation of neurophysiologic and functional connectivity changes following glioma resection using magnetoencephalography.

Nardin Samuel, Irene E Harmsen, Mandy Yi Rong Ding, Can Sarica, Artur Vetkas, Christine Wong, Vanessa Lawton, Andrew Yang, Nathan C Rowland, Suneil K Kalia and 6 more

Abstract read
In one paragraph

Article in Neuro-oncology advances. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
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

2 citing papers in PubMed.

  1. Serum response factor as a prognostic indicator of angiogenesis and early recurrence in Glioblastoma: a retrospective immunohistochemical study.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2026
    Article
  2. Article
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

16 authors.

Nardin SamuelToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Irene E HarmsenToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Mandy Yi Rong DingKrembil Research Institute, University Health Network, Toronto, Ontario, Canada.
Can SaricaToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Artur VetkasToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.ORCID https://orcid.org/0000-0002-4487-432X
Christine WongToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Vanessa LawtonToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Andrew YangDepartment of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina, USA.
Nathan C RowlandDepartment of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina, USA.
Suneil K KaliaToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Taufik ValianteToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.ORCID https://orcid.org/0000-0002-3443-3790
Richard WennbergMitchell Goldhar MEG Unit, University Health Network, Toronto, Canada.
Gelareh ZadehToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.ORCID https://orcid.org/0000-0002-6637-4502
Paul KongkhamToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Aristotelis KalyvasToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.
Andres M LozanoToronto Western Hospital, Division of Neurosurgery, University Health Network, Toronto, Ontario, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: In patients with glioma, clinical manifestations of neural network disruption include behavioral changes, cognitive decline, and seizures. However, the extent of network recovery following surgery remains unclear. The aim of this study was to characterize the neurophysiologic and functional connectivity changes following glioma surgery using magnetoencephalography (MEG). Methods: Ten patients with newly diagnosed intra-axial brain tumors undergoing surgical resection were enrolled in the study and completed at least two MEG recordings (pre-operative and immediate post-operative). An additional post-operative recording 6-8 weeks following surgery was obtained for six patients. Resting-state MEG recordings from 28 healthy controls were used for network-based comparisons. MEG data processing involved artifact suppression, high-pass filtering, and source localization. Functional connectivity between parcellated brain regions was estimated using coherence values from 116 virtual channels. Statistical analysis involved standard parametric tests. Results: Distinct alterations in spectral power following tumor resection were observed, with at least three frequency bands affected across all study subjects. Tumor location-related changes were observed in specific frequency bands unique to each patient. Recovery of regional functional connectivity occurred following glioma resection, as determined by local coherence normalization. Changes in inter-regional functional connectivity were mapped across the brain, with comparable changes in low to mid gamma-associated functional connectivity noted in four patients. Conclusion: Our findings provide a framework for future studies to examine other network changes in glioma patients. We demonstrate an intrinsic capacity for neural network regeneration in the post-operative setting. Further work should be aimed at correlating neurophysiologic changes with individual patients' clinical outcomes.

Indexed as

functional connectivitygliomamagnetoencephalographyneural networks

Identifiers

PMID37547265
PMCPMC10403751

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.