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the claim

Scintillating scotomas are caused by cortical spreading depression

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Scintillating scotomas and other migraine visual auras are widely supported by scientific literature to be caused by cortical spreading depression, a slowly propagating wave of neuronal and glial depolarization.

The analysis

The vast majority of the provided literature (papers 0, 1, 6, 7, and 11) explicitly state or accept that cortical spreading depression (CSD) is the underlying mechanism of migraine aura and scintillating scotomas. Although paper 10 argues that canonical CSD models have some limitations and inconsistencies when translated directly to human symptoms, the overwhelming consensus across reviews and experimental studies heavily favors the established view that CSD causes migraine aura.

Evidence for · 5
Migraine Visual Aura and Cortical Spreading Depression—Linking Mathematical Models to Empirical Evidence
Recorded source metadata

Louise O’Hare, Jordi M. Asher, Paul B. Hibbard. Migraine Visual Aura and Cortical Spreading Depression—Linking Mathematical Models to Empirical Evidence. 2021. https://doi.org/10.3390/vision5020030

The review notes that reaction-diffusion models use cortical spreading depolarisation and depression to model the hallucinations and visual aura experienced in migraines.

Evidence against · 1
Is canonical SD a clinically relevant model of migraine? Argument con.
Recorded source metadata

Alpay B, Vuralli D, Bolay H. Is canonical SD a clinically relevant model of migraine? Argument con.. 2025. https://doi.org/10.1186/s10194-025-02177-y

The article argues that translating canonical cortical spreading depolarization directly to human aura symptoms presents inconsistencies and oversimplifies the mechanism.

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More for · 4
Vagus nerve stimulation inhibits cortical spreading depression via glutamate-dependent TrkB activation mechanism in the nucleus tractus solitarius
Recorded source metadata

Tzu-Ting Liu, Shih-Pin Chen, Shuu-Jiun Wang, J. Yen. Vagus nerve stimulation inhibits cortical spreading depression via glutamate-dependent TrkB activation mechanism in the nucleus tractus solitarius. 2024. https://doi.org/10.1177/03331024241230466

The paper explicitly references cortical spreading depression as the underlying mechanism of migraine aura.

Rethinking migraine with aura: Why cortical spreading depolarization (depression), not aura, causes headaches
Recorded source metadata

Michael A. Moskowitz. Rethinking migraine with aura: Why cortical spreading depolarization (depression), not aura, causes headaches. 2025. https://doi.org/10.1177/03331024251370629

The study states that cortical spreading depolarization and depression underlies migrainous aura.

What does a migraine aura look like?-A systematic review.
Recorded source metadata

Joppeková Ľ, Pinto MJ, da Costa MD, Boček R, Berman G, Salim Y, Akhtanova D, Abzalbekova A, MaassenVanDenBrink A, Lampl C. What does a migraine aura look like?-A systematic review.. 2025. https://doi.org/10.1186/s10194-025-02080-6

The systematic review confirms that the underlying pathophysiology of migraine aura is closely tied to cortical spreading depression.

Is canonical SD a clinically relevant model of migraine? Argument pro.
Recorded source metadata

Oncel MM, Harriott AM. Is canonical SD a clinically relevant model of migraine? Argument pro.. 2025. https://doi.org/10.1186/s10194-025-02175-0

The article affirms that cortical spreading depression is the likely electrical event responsible for aura, including scintillating scotoma.

The paper trail · every fact has a biography
first checked01 Aug 2026
judged → SUPPORTED · 6201 Aug 2026
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