Journal
BRAIN AND LANGUAGE
Volume 205, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bandl.2020.104775
Keywords
rTMS; Theta burst stimulation; EEG; ERP; Language switching; Bilingualism; Dorsolateral prefrontal cortex
Funding
- Swiss National Science Foundation [325130_156937]
- Swiss National Science Foundation (SNF) [325130_156937] Funding Source: Swiss National Science Foundation (SNF)
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This study investigated the role of the left dorsolateral prefrontal cortex (DLPFC) in language switching using theta burst stimulation (TBS) and electroencephalography in late bilinguals. After a sham-controlled baseline, participants received either excitatory or inhibitory TBS over the left DLPFC before conducting picture naming tasks in pure language blocks and a language switching block, as well as a nonverbal switching task. On the behavioral level, we found no effect of TBS. However, the ERP-analysis revealed an effect of Stimulation for the picture naming tasks, characterized by alterations in the left DLPFC at 20-72 ms, and in networks associated with conflict resolution and self-monitoring at 533-600 ms. As we did not find an interaction between Stimulation and Block (switching vs non-switching), prefrontal stimulation did not specifically modulate interlanguage control. The left DLPFC might rather be involved in enhancing maintenance of task demands and self-monitoring during language production in both mono- and bilingual contexts.
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