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Young-Mok Song, MD; Jee-Young Lee, MD; Jong-Moo Park, MD; Byung-Woo Yoon, MD, PhD; Jae-Kyu Roh, MD, PhD

Arch Neurol. 2005;62:809-811.

Ipsilateral hemiparesis after a supratentorial stroke is rare. However, the role of the reorganization of the unaffected hemisphere in recovery after a stroke is poorly understood. Two patients developed ipsilateral hemiparesis after a left corona radiata infarct. Both of these patients had previously experienced contralateral hemiparesis after a right-sided supratentorial stroke. Functional magnetic resonance imaging demonstrated bilateral motor area activation during paretic left hand movement. This finding suggests that the ipsilateral hemiparesis was caused by a new stroke in the ipsilateral motor system that was functionally reorganized after the previous stroke.

Author Affiliations: Department of Neurology, Dankook University Hospital, Cheonan, Korea (Dr Song), and Department of Neurology, Seoul National University Hospital, Seoul, Korea (Drs Lee, Park, Yoon, and Roh).