Research Papers: PDF OnlySuccessive activation of both cerebral hemispheres during cued word generationKnecht, S.; Henningsen, H.; Deppe, M.; Huber, T.; Ebner, A.; Ringelstein, E.-B. Author Information Department of Neurology, University of Münster, Albert-Schweitzer-Strasse 33, D-48129 Münster, Germany NeuroReport: February 29, 1996 - Volume 7 - Issue 3 - p 820-824 Buy Abstract Most humans have a left hemispheric dominance for language. However, during diagnostic language testing there also is activation of the right hemisphere, which is probably related to attention. To investigate further the role of attention during language production we monitored cerebral blood flow velocities in the middle cerebral arteries by continuous bilateral transcranial Doppler ultrasonography (TCD) in nine right-handed subjects. During cued word generation, a successive activation of the right hemisphere in the preparatory phase, and of the left hemisphere during word searching was demonstrated. These findings indicate that attentional processes precede verbal activation and that the two procedures can be separated by comparative blood flow velocity measurement. © Lippincott-Raven Publishers.