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NEUROLOGY 2005;65:1974-1975
© 2005 American Academy of Neurology
Brief Communications

Gender differences in handedness and speech lateralization related to early neurologic insults

John W. Miller, MD, PhD, Suman Jayadev, MD, Carl B. Dodrill, PhD and George A. Ojemann, MD

From the Regional Epilepsy Center (Drs. Miller, Jayadev, Dodrill, and Ojemann), Harborview Medical Center and Departments of Neurology (Drs. Miller, Jayadev, and Dodrill) and Neurological Surgery (Drs. Miller, Dodrill, and Ojemann), University of Washington School of Medicine, Seattle.

Address correspondence and reprint requests to Dr. John W. Miller, Regional Epilepsy Center, Box 359745, Harborview Medical Center, 325 Ninth Avenue, Seattle, WA 98104-2499; e-mail: millerjw{at}u.washington.edu

Left-handedness is a normal variant but also may result from early-life brain insults. Speech typically resides in the left cerebral hemisphere in normal subjects. In 170 subjects with past brain injuries, bilateral or right hemisphere speech lateralization, determined by the intracarotid amobarbital procedure, was more frequent in females (19 vs 5, p = 0.003) as was left-handedness (26 vs 10, p = 0.004). This could be attributed to greater plasticity or functional symmetry in females.

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 December 27 issue to find the title link for this article.

Disclosure: The authors report no conflicts of interest.

Received June 30, 2005. Accepted in final form September 12, 2005.




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