Evidence map›Paper›PMID 35169699›Full record

ArticleBrain communications2022

Cortical oscillatory dysrhythmias in visual snow syndrome: a magnetoencephalography study.

Jenny L Hepschke, Robert A Seymour, Wei He, Andrew Etchell, Paul F Sowman, Clare L Fraser

Open access · goldAbstract read
In one paragraph

Article in Brain communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.8field-weighted citation impact, top 16% 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

16 citing papers in PubMed, 29 citations in OpenAlex.

  1. Review
  2. Article
  3. Repetitive transcranial magnetic stimulation for visual snow syndrome: symptoms relief and changes in brain dynamics. A case report.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Article
  4. Article
  5. Article
  6. Visual Snow Is Susceptible to the Motion Aftereffect.Investigative ophthalmology & visual science · 2025
    Article
  7. Visual Snow Syndrome: Therapeutic Implications.Journal of clinical medicine · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Review
  15. Article
  16. 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

6 authors at 3 institutions in 2 countries.

Jenny L HepschkeSave Sight Institute, Faculty of Health and Medicine, The University of Sydney, Sydney, NSW, Australia.
Robert A SeymourWellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK.ORCID https://orcid.org/0000-0001-8600-8123
Wei HeDepartment of Cognitive Science, Macquarie University, Sydney, NSW, Australia.
Andrew EtchellDepartment of Cognitive Science, Macquarie University, Sydney, NSW, Australia.
Paul F SowmanDepartment of Cognitive Science, Macquarie University, Sydney, NSW, Australia.
Clare L FraserSave Sight Institute, Faculty of Health and Medicine, The University of Sydney, Sydney, NSW, Australia.ORCID https://orcid.org/0000-0002-0379-7743
Macquarie University · AUThe University of Sydney · AUWellcome Centre for Human Neuroimaging · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Visual snow refers to the persistent visual experience of static in the whole visual field of both eyes. It is often reported by patients with migraine and co-occurs with conditions such as tinnitus and tremor. The underlying pathophysiology of the condition is poorly understood. Previously, we hypothesized that visual snow syndrome may be characterized by disruptions to rhythmical activity within the visual system. To test this, data from 18 patients diagnosed with visual snow syndrome, and 16 matched controls, were acquired using magnetoencephalography. Participants were presented with visual grating stimuli, known to elicit decreases in alpha-band (8-13 Hz) power and increases in gamma-band power (40-70 Hz). Data were mapped to source-space using a beamformer. Across both groups, decreased alpha power and increased gamma power localized to early visual cortex. Data from the primary visual cortex were compared between groups. No differences were found in either alpha or gamma peak frequency or the magnitude of alpha power,

Indexed as

dysrhythmiamagnetoencephalographymigrainephase–amplitude couplingvisual snow

Identifiers

PMID35169699
PMCPMC8833316
OpenAlexW4206675437

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.