Supplementary Material for: The Overlap of Migraine and Transient Global Amnesia: A Case Report and Literature Review on the Concept of ‘Migramnesia’

Introduction: The pathophysiological relationship between migraine and transient global amnesia (TGA) remains unclear. We present a case of TGA occurring temporally with a migraine attack and review the existing literature on this potential association, sometimes termed ‘migramnesia’. Case Presentation: A 58-year-old man with a history of episodic migraine with aura experienced a severe typical migraine headache. Approximately three hours after onset, he awoke with profound anterograde and retrograde amnesia lasting three hours, meeting clinical criteria for TGA. He had no recollection of the amnestic episode or the preceding headache. Brain MRI was unremarkable. Conclusion: This case adds to the limited number of reports describing a temporal link between migraine and TGA events. A review of the literature reveals conflicting evidence regarding migraine as a risk factor for TGA recurrence. While our case and some studies suggest a plausible association, the evidence is inconsistent. This case highlights the need for further research, including rigorous prospective studies and analyses of potential migraine-related subgroups within TGA populations, to clarify any underlying pathophysiological connections.