Volume 25, Issue 7 pp. 507-518

MR-spectroscopic imaging during visual stimulation in subgroups of migraine with aura

PS Sándor

Corresponding Author

PS Sándor

Neurology Department, University Hospital and

Dr P. S. Sándor, Neurology Department, Frauenklinikstrasse 26, University Hospitals Zürich, CH-8091 Zürich, Switzerland. Tel. + 41 76 320 5952, fax + 41 1271 5952, e-mail [email protected]Search for more papers by this author
U Dydak

U Dydak

Institute for Biomedical Engineering, University and ETH, ETH Zentrum, Zürich, Switzerland,

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J Schoenen

J Schoenen

Neurology Department, University Hospital, CHR Citadelle, Liège, Belgium, and

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Ss Kollias

Ss Kollias

Institute of Neuroradiology, University Hospital, Zürich, Switzerland

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K Hess

K Hess

Neurology Department, University Hospital and

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P Boesiger

P Boesiger

Institute for Biomedical Engineering, University and ETH, ETH Zentrum, Zürich, Switzerland,

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RM Agosti

RM Agosti

Neurology Department, University Hospital and

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First published: 14 June 2005
Citations: 18

Abstract

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Migraine pathophysiology possibly involves deficient mitochondrial energy reserve and diminished cortical habituation. Using functional magnetic resonance spectroscopic imaging (fMRSI), we studied cortical lactate changes during prolonged visual stimulation to search for different pathophysiological mechanisms in clinically distinct subgroups of migraine with aura. Eleven healthy volunteers (HV) and 10 migraine patients were investigated interictally: five with visual aura (MA) and five with visual symptoms and at least one of the following: paraesthesia, paresis or dysphasia (MAplus). Using MRSI (Philips, 1.5 T) 1H-spectra were repeatedly obtained from a 25 mm-thick slice covering visual and non-visual cortex, with the first and fifth measurements in darkness and the second to fourth with 8-Hz checkerboard stimulation. In MAplus lactate increased only during stimulation, only in visual cortex; in MA resting lactate was high in visual cortex, without further increase during stimulation. This is compatible with an abnormal metabolic strain during stimulation in MAplus, possibly due to dishabituation, and a predominant mitochondrial dysfunction in MA.

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