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American Journal of Neuroradiology 26:831-834, April 2005
© 2005 American Society of Neuroradiology

Case Report
BRAIN

Persistence of Congenital Mirror Movements after Hemiplegic Stroke

Maria A. Roccaa,b, Domenico M. Mezzapesaa, Maurom Comolab, Letizia Leocanib, Andrea Falinic, Roberto Gattid, Silvia Mammib, Giancarlo Comib and Massimo Filippia

a Neuroimaging Research Unit, Scientific Institute and University Ospedale San Raffaele, Milan, Italy
b Departments of Neurology and Clinical Neurophysiology, Scientific Institute and University Ospedale San Raffaele, Milan, Italy
c Department of Neuroradiology, Scientific Institute and University Ospedale San Raffaele, Milan, Italy
d Rehabilitation Unit, Scientific Institute and University Ospedale San Raffaele, Milan, Italy

Address correspondence to Dr. Massimo Filippi, Neuroimaging Research Unit Department of Neurology, Scientific Institute and University Ospedale San Raffaele, Via Olgettina, 60, 20132 Milan, Italy

Summary: We describe a case of hereditary congenital mirror movements (MMs) in a 76-year-old man, who after an ischemic stroke, had persistence of MMs in the paretic hand during voluntary movements of the contralateral arm. By using functional MR imaging to investigate the performance of motor and sensory tasks with the affected and the unaffected hands, we found evidence for increased ipsilateral primary motor cortex activity and reduced transcallosal inhibition. Both these mechanisms are likely to be involved in the genesis of MMs.






Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X