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Validity of chronometric TMS for probing the time-course of word production: A modified replication

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Jodzio,  Adrian
Neural Dynamics of Language Production, MPI for Psycholinguistics, Max Planck Society;
International Max Planck Research School for Language Sciences, MPI for Psycholinguistics, Max Planck Society;
Donders Institute for Brain, Cognition and Behaviour, External Organizations;

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Indefrey,  Peter
Neural Dynamics of Language Production, MPI for Psycholinguistics, Max Planck Society;
Donders Institute for Brain, Cognition and Behaviour, External Organizations;
Heinrich Heine University;

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Citation

Jodzio, A., Piai, V., Verhagen, L., Cameron, I., & Indefrey, P. (2023). Validity of chronometric TMS for probing the time-course of word production: A modified replication. Cerebral Cortex, 33(12), 7816-7829. doi:10.1093/cercor/bhad081.


Cite as: https://hdl.handle.net/21.11116/0000-000D-3E2E-C
Abstract
In the present study, we used chronometric TMS to probe the time-course of 3 brain regions during a picture naming task. The left inferior frontal gyrus, left posterior middle temporal gyrus, and left posterior superior temporal gyrus were all separately stimulated in 1 of 5 time-windows (225, 300, 375, 450, and 525 ms) from picture onset. We found posterior temporal areas to be causally involved in picture naming in earlier time-windows, whereas all 3 regions appear to be involved in the later time-windows. However, chronometric TMS produces nonspecific effects that may impact behavior, and furthermore, the time-course of any given process is a product of both the involved processing stages along with individual variation in the duration of each stage. We therefore extend previous work in the field by accounting for both individual variations in naming latencies and directly testing for nonspecific effects of TMS. Our findings reveal that both factors influence behavioral outcomes at the group level, underlining the importance of accounting for individual variations in naming latencies, especially for late processing stages closer to articulation, and recognizing the presence of nonspecific effects of TMS. The paper advances key considerations and avenues for future work using chronometric TMS to study overt production.