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NEUROLOGY 2007;68:862-864
© 2007 American Academy of Neurology

Dominant limb motor impersistence associated with callosal disconnection

S. W. Seo, MD, K. Jung, MS, H. You, PhD, E. J. Kim, MD, B. H. Lee, MA, J. C. Adair, MD and D. L. Na, MD

From the Department of Neurology (S.W.S., E.J.K., B.H.L., D.L.N.), Samsung Medical Center, Sungkyunkwan University School of Medicine, and Department of Industrial and Management Engineering (K.J., H.Y.), Pohang University of Science and Technology, Seoul, Korea; and Department of Neurology (J.C.A.), University of New Mexico and Veterans Affairs Medical Center, Albuquerque, NM.

Address correspondence and reprint requests to Dr Na, Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul 135-710, Korea; e-mail: dukna{at}smc.samsung.co.kr

Motor impersistence occurs more frequently after right than left hemispheric lesions. Following a callosal lesion, motor impersistence may thus occur more frequently in the right (dominant) than left limb. After an infarction involving the right medial frontal lobe and corpus callosum, a 66-year-old right-handed man demonstrated right limb motor impersistence on bedside evaluation, which was substantiated experimentally. Results demonstrated hemispatial effects with greater impersistence in the neglected (right) space.

Additional material related to this article can be found on the Neurology Web site. Go to www.neurology.org and scroll down the Table of Contents for the March 13 issue to find the title link for this article.

Supported by a Korea Research Foundation grant (KRF-2004-042-H00024).

Disclosure: The authors report no conflicts of interest.

Received June 12, 2006. Accepted in final form November 27, 2006.






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