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Neurology 2000;54:1531-1533
© 2000 American Academy of Neurology
Brief Communications

Functional MRI in double cortex: Functionality of heterotopia

J.-M. Pinard, MD, A. Feydy, MD, R. Carlier, MD, N. Perez, MD, L. Pierot, MD and Y. Burnod, PhD

From the Department of Paediatric Neurology (Drs. Pinard and Perez), Department of Radiology (Drs. Feydy and Carlier), Raymond Poincaré Hospital, Garches; the Neuroradiology Unit (Dr. Pierot), Foch Hospital, Suresnes; and INSERM U483 (Dr. Burnod), Paris, France.

Address correspondence and reprint requests to Dr. Jean-Marc Pinard, Department of Paediatric Neurology, Raymond Poincaré Hospital, 92380, Garches, France; e-mail: jean-marc.pinard{at}rpc.ap-hop-paris.fr

A 12-year-old boy with epilepsy and subcortical laminar heterotopia (band heterotopia) underwent a functional MRI protocol to study voluntary motor activity in the hand. Finger tapping produced an activation of a contralateral limited and focused frontal cortical area both in the subcortical band heterotopia and the overlying cortex. Despite its epileptogenic activity, subcortical laminar heterotopia seems to be responsible for part of the functional activity of the brain. This has to be pointed out for epilepsy surgery resecting cortical dysplasia.

Key words: Functional MRI—Motor cortex—Bandheterotopia—Epilepsy—Cortical dysplasia




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