Charting the functional relevance of Broca’s area for visual word recognition and picture naming in Dutch using fMRI-guided TMS

Wheat, Katherine, Cornelissen, Piers, Sack, Alexander, Schuhmann, Teresa, Goebel, Rainer and Blomert, Leo (2013) Charting the functional relevance of Broca’s area for visual word recognition and picture naming in Dutch using fMRI-guided TMS. Brain and Language, 125 (2). pp. 223-230. ISSN 0093-934X

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Official URL: http://dx.doi.org/10.1016/j.bandl.2012.04.016

Abstract

Magnetoencephalography (MEG) has shown pseudohomophone priming effects at Broca’s area (specifically pars opercularis of left inferior frontal gyrus and precentral gyrus; LIFGpo/PCG) within ∼100 ms of viewing a word. This is consistent with Broca’s area involvement in fast phonological access during visual word recognition. Here we used online transcranial magnetic stimulation (TMS) to investigate whether LIFGpo/PCG is necessary for (not just correlated with) visual word recognition by ∼100 ms. Pulses were delivered to individually fMRI-defined LIFGpo/PCG in Dutch speakers 75–500 ms after stimulus onset during reading and picture naming. Reading and picture naming reactions times were significantly slower following pulses at 225–300 ms. Contrary to predictions, there was no disruption to reading for pulses before 225 ms. This does not provide evidence in favour of a functional role for LIFGpo/PCG in reading before 225 ms in this case, but does extend previous findings in picture stimuli to written Dutch words.

Item Type: Article
Uncontrolled Keywords: Transcranial magnetic stimulation, fMRI, visual word recognition, picture naming, inferior frontal gyrus, precentral gyrus
Subjects: B900 Others in Subjects allied to Medicine
Q100 Linguistics
Department: Faculties > Health and Life Sciences > School of Life Sciences > Psychology
Depositing User: Ay Okpokam
Date Deposited: 09 Sep 2013 14:25
Last Modified: 10 Aug 2015 11:34
URI: http://nrl.northumbria.ac.uk/id/eprint/13485

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