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NEUROLOGY 2006;67:1059-1061
© 2006 American Academy of Neurology
Brief Communications

No indication of brain reorganization after unilateral ischemic lesions of the auditory cortex

P. Sörös, MD, R. Dziewas, MD, E. Manemann, MD, I. K. Teismann, MD and B. Lütkenhöner, MD

From the Department of Imaging Research, Sunnybrook Health Sciences Centre, and the Toronto Rehabilitation Institute, Toronto, Ontario, Canada (P.S.); and the Departments of Neurology (R.D., E.M., I.K.T.) and Otolaryngology, Head and Neck Surgery (B.L.), Münster University Hospital, Germany.

Address correspondence and reprint requests to Dr. Peter Sörös, Department of Imaging Research, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, M4N 3M5, Canada; e-mail: peter.soros{at}sri.utoronto.ca

We used magnetoencephalography to study contralesional auditory reorganization in three men with chronic unilateral ischemic lesions of the auditory cortex. Although no response was found over the lesioned hemisphere, processing in the unaffected hemisphere was indistinguishable vs healthy controls. In contrast to sensorimotor and language systems, the auditory system seems to lack contralateral reorganization, presumably because patients are typically not aware of hearing deficits and thus do not perform training.

Dr. Sörös is funded by the Heart and Stroke Foundation of Ontario Centre for Stroke Recovery. In addition, he received funding from the Louis and Leah Posluns Centre for Stroke and Cognition and the J.F. McDonnell Foundation.

Disclosure: The authors report no conflicts of interest.

Received March 13, 2006. Accepted in final form May 26, 2006.






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