Determination of crossed language dominance: dissociation of language lateralization within the temporoparietal cortex |
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Authors: | Andreas Jansen Stephanie Müller Johannes Bedenbender Sören Krach Frieder M. Paulus Tilo Kircher |
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Affiliation: | 1. Department of Psychiatry and Psychotherapy , Philipps-University Marburg , Marburg , Germany jansena@med.uni-marburg.de;3. Department of Psychiatry and Psychotherapy , Philipps-University Marburg , Marburg , Germany |
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Abstract: | ‘Crossed language dominance’ is a rare form of language lateralization, characterized by a dissociation of anterior and posterior language regions. We present the case of a healthy subject whose language lateralization pattern, as assessed by functional magnetic resonance imaging, is reliably characterized as crossed language dominance based on a word generation task, but typical left-lateralized when a semantic decision task is applied. A single language task is therefore not sufficient to characterize language lateralization, at least not for subjects with rare forms of language dominance. In the pre-surgical diagnostic of language lateralization, several language tasks tapping into different aspects of language functions should be applied. |
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Keywords: | Crossed language dominance Lateralization fMRI |
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