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G. Frank Crowell, MD; David A. Stump, PhD; José Biller, MD; Lawrence C. McHenry, Jr, MD; James F. Toole, MD

Arch Neurol. 1984;41(1):75-79.

Abstract
• Twelve patients with transient global amnesia (TGA) were studied. Seven (58%) of the 12 had a headache during their attack; five (42%) of the 12 were migraineurs. Measurement of regional cerebral blood flow (rCBF) by the xenon Xe 133 inhalation method showed similar patterns of flow in five of the seven patients tested. The rCBF abnormalities were impaired vasomotor response in the watershed area between the middle cerebral artery and posterior cerebral artery territories, and/or focal ischemia in the inferior part of the temporal lobe. These rCBF abnormalities differed from those seen in patients with carotid transient ischemic attacks (TIAs) and vertebrobasilar TIAs. We speculate that the vasomotor phenomena in migraine may play a major role in the cause of TGA.

Author Affiliations
From the Department of Neurology, Bowman Gray School of Medicine, Winston-Salem, NC.

Footnotes
Accepted for publication March 29, 1983.

Read in part before the American Academy of Neurology, Washington, DC, April 29, 1982.

Reprint requests to Department of Neurology, Bowman Gray School of Medicine, Winston-Salem, NC 27103 (Dr Crowell).

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