Handedness and fMRI-activation patterns in sentence processing

Joergens, S.; Kleiser, R.; Indefrey, Peter

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Handedness and fMRI-activation patterns in sentence processing

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Indefrey, Peter
Language Acquisition Group, MPI for Psycholinguistics, Max Planck Society;
The Dynamics of Multilingual Processing, MPI for Psycholinguistics, Max Planck Society;

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Joergens, S., Kleiser, R., & Indefrey, P. (2007). Handedness and fMRI-activation patterns in sentence processing. NeuroReport, 18(13), 1339-1343.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-17A8-F

Abstract

We investigate differences of cerebral activation in 12 right-handed and left-handed participants, respectively, using a sentence-processing task. Functional MRI shows activation of left-frontal and inferior-parietal speech areas (BA 44, BA9, BA 40) in both groups, but a stronger bilateral activation in left-handers. Direct group comparison reveals a stronger activation in right-frontal cortex (BA 47, BA 6) and left cerebellum in left-handers. Laterality indices for the inferior-frontal cortex are less asymmetric in left-handers and are not related to the degree of handedness. Thus, our results show that sentence-processing induced enhanced activation involving a bilateral network in left-handed participants.