The brain is typically organized in such a way that interhemispheric transfer is reduced in favor of intrahemispheric communication.1 Functions such as language that require extensive forward and backward interactions therefore tend to be processed in 1 hemisphere. Herein, we report functional imaging data of a healthy man who showed a rare form of atypical language dominance with an interhemispheric dissociation of anterior (Broca area) and posterior (Wernicke area) language regions (“crossed language dominance”).
Jansen A, Deppe M, Schwindt W, Mohammadi S, Sehlmeyer C, Knecht S. Interhemispheric Dissociation of Language Regions in a Healthy Subject. Arch Neurol. 2006;63(9):1344-1346. doi:10.1001/archneur.63.9.1344