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Erschienen in: Current Neurology and Neuroscience Reports 8/2018

01.08.2017 | Headache (R Halker, Section Editor)

Visual Snow Syndrome: Proposed Criteria, Clinical Implications, and Pathophysiology

verfasst von: Abby I. Metzler, Carrie E. Robertson

Erschienen in: Current Neurology and Neuroscience Reports | Ausgabe 8/2018

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Abstract

Purpose of Review

In this article, we review illustrative case descriptions of both primary and secondary visual snow from our clinic. We discuss recently proposed criteria for visual snow syndrome and offer a slight modification of these criteria. We also discuss the theories on the pathophysiological mechanisms of visual snow, as well as the current approach to treatment.

Recent Findings

Visual snow is a condition where patients see constant, innumerable flickering dots throughout the visual field, similar to “TV static.” Though visual snow was originally described in 1995, there were still fewer than 10 cases in the literature prior to 2014. In the last 4 years, this has grown to approximately 200 cases and there has been a concentrated effort to better understand and characterize this condition. It has become apparent that patients who see visual snow frequently have additional visual and non-visual symptoms, and the consistency of these symptoms has led to proposed criteria for visual snow syndrome.

Summary

When seeing a patient with visual snow, it is important to rule out a possible underlying secondary etiology. Patients with visual snow syndrome frequently have comorbid migraine, but visual snow appears to be a separate entity from persistent migraine aura. The pathophysiology of this syndrome is not clear, but recent neurophysiologic and neuroimaging studies have helped advance our understanding.
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Metadaten
Titel
Visual Snow Syndrome: Proposed Criteria, Clinical Implications, and Pathophysiology
verfasst von
Abby I. Metzler
Carrie E. Robertson
Publikationsdatum
01.08.2017
Verlag
Springer US
Erschienen in
Current Neurology and Neuroscience Reports / Ausgabe 8/2018
Print ISSN: 1528-4042
Elektronische ISSN: 1534-6293
DOI
https://doi.org/10.1007/s11910-018-0854-2

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